Support for push/pull classes

[minorOffense]

I've gone ahead and added the push/pull classes from the 960 templates into the grid.css to allow those options to be used in a fluid layout.

I don't really know how to make a pull request so I've just pasted the code here.

Let me know if you have any issues. So far though, my sites seem to be working with these changes.

/*
    960 Grid System ~ Core CSS.
    Learn more ~ http://960.gs/

    Licensed under GPL and MIT.
*/

/* =Containers
--------------------------------------------------------------------------------*/

.container_12,
.container_16
{
    width: 92%;
    margin-left: 4%;
    margin-right: 4%;
}

/* =Grid >> Global
--------------------------------------------------------------------------------*/

.grid_1,
.grid_2,
.grid_3,
.grid_4,
.grid_5,
.grid_6,
.grid_7,
.grid_8,
.grid_9,
.grid_10,
.grid_11,
.grid_12,
.grid_13,
.grid_14,
.grid_15,
.grid_16
{
    display: inline;
    float: left;
    margin-left: 1%;
    margin-right: 1%;
}

.container_12 .grid_3,
.container_16 .grid_4
{
    width: 23%;
}

.container_12 .grid_6,
.container_16 .grid_8
{
    width: 48%;
}

.container_12 .grid_9,
.container_16 .grid_12
{
    width: 73%;
}

.container_12 .grid_12,
.container_16 .grid_16
{
    width: 98%;
}

/* =Grid >> Children (Alpha ~ First, Omega ~ Last)
--------------------------------------------------------------------------------*/

.alpha
{
    margin-left: 0;
}

.omega
{
    margin-right: 0;
}

/* =Grid >> 12 Columns
--------------------------------------------------------------------------------*/

.container_12 .grid_1
{
    width: 6.333%;
}

.container_12 .grid_2
{
    width: 14.666%;
}

.container_12 .grid_4
{
    width: 31.333%;
}

.container_12 .grid_5
{
    width: 39.666%;
}

.container_12 .grid_7
{
    width: 56.333%;
}

.container_12 .grid_8
{
    width: 64.666%;
}

.container_12 .grid_10
{
    width: 81.333%;
}

.container_12 .grid_11
{
    width: 89.666%;
}

/* =Grid >> 16 Columns
--------------------------------------------------------------------------------*/

.container_16 .grid_1
{
    width: 4.25%;
}

.container_16 .grid_2
{
    width: 10.5%;
}

.container_16 .grid_3
{
    width: 16.75%;
}

.container_16 .grid_5
{
    width: 29.25%;
}

.container_16 .grid_6
{
    width: 35.5%;
}

.container_16 .grid_7
{
    width: 41.75%;
}

.container_16 .grid_9
{
    width: 54.25%;
}

.container_16 .grid_10
{
    width: 60.5%;
}

.container_16 .grid_11
{
    width: 66.75%;
}

.container_16 .grid_13
{
    width: 79.25%;
}

.container_16 .grid_14
{
    width: 85.5%;
}

.container_16 .grid_15
{
    width: 91.75%;
}

/* =Prefix Extra Space >> Global
--------------------------------------------------------------------------------*/

.container_12 .prefix_3,
.container_16 .prefix_4
{
    padding-left: 25%;
}

.container_12 .prefix_6,
.container_16 .prefix_8
{
    padding-left: 50%;
}

.container_12 .prefix_9,
.container_16 .prefix_12
{
    padding-left: 75%;
}

/* =Prefix Extra Space >> 12 Columns
--------------------------------------------------------------------------------*/

.container_12 .prefix_1
{
    padding-left: 8.333%;
}

.container_12 .prefix_2
{
    padding-left: 16.666%;
}

.container_12 .prefix_4
{
    padding-left: 33.333%;
}

.container_12 .prefix_5
{
    padding-left: 41.666%;
}

.container_12 .prefix_7
{
    padding-left: 58.333%;
}

.container_12 .prefix_8
{
    padding-left: 66.666%;
}

.container_12 .prefix_10
{
    padding-left: 83.333%;
}

.container_12 .prefix_11
{
    padding-left: 91.666%;
}

/* =Prefix Extra Space >> 16 Columns
--------------------------------------------------------------------------------*/

.container_16 .prefix_1
{
    padding-left: 6.25%;
}

.container_16 .prefix_2
{
    padding-left: 12.5%;
}

.container_16 .prefix_3
{
    padding-left: 18.75%;
}

.container_16 .prefix_5
{
    padding-left: 31.25%;
}

.container_16 .prefix_6
{
    padding-left: 37.5%;
}

.container_16 .prefix_7
{
    padding-left: 43.75%;
}

.container_16 .prefix_9
{
    padding-left: 56.25%;
}

.container_16 .prefix_10
{
    padding-left: 62.5%;
}

.container_16 .prefix_11
{
    padding-left: 68.75%;
}

.container_16 .prefix_13
{
    padding-left: 81.25%;
}

.container_16 .prefix_14
{
    padding-left: 87.5%;
}

.container_16 .prefix_15
{
    padding-left: 93.75%;
}

/* =Suffix Extra Space >> Global
--------------------------------------------------------------------------------*/

.container_12 .suffix_3,
.container_16 .suffix_4
{
    padding-right: 25%;
}

.container_12 .suffix_6,
.container_16 .suffix_8
{
    padding-right: 50%;
}

.container_12 .suffix_9,
.container_16 .suffix_12
{
    padding-right: 75%;
}

/* =Suffix Extra Space >> 12 Columns
--------------------------------------------------------------------------------*/

.container_12 .suffix_1
{
    padding-right: 8.333%;
}

.container_12 .suffix_2
{
    padding-right: 16.666%;
}

.container_12 .suffix_4
{
    padding-right: 33.333%;
}

.container_12 .suffix_5
{
    padding-right: 41.666%;
}

.container_12 .suffix_7
{
    padding-right: 58.333%;
}

.container_12 .suffix_8
{
    padding-right: 66.666%;
}

.container_12 .suffix_10
{
    padding-right: 83.333%;
}

.container_12 .suffix_11
{
    padding-right: 91.666%;
}

/* =Suffix Extra Space >> 16 Columns
--------------------------------------------------------------------------------*/

.container_16 .suffix_1
{
    padding-right: 6.25%;
}

.container_16 .suffix_2
{
    padding-right: 16.5%;
}

.container_16 .suffix_3
{
    padding-right: 18.75%;
}

.container_16 .suffix_5
{
    padding-right: 31.25%;
}

.container_16 .suffix_6
{
    padding-right: 37.5%;
}

.container_16 .suffix_7
{
    padding-right: 43.75%;
}

.container_16 .suffix_9
{
    padding-right: 56.25%;
}

.container_16 .suffix_10
{
    padding-right: 62.5%;
}

.container_16 .suffix_11
{
    padding-right: 68.75%;
}

.container_16 .suffix_13
{
    padding-right: 81.25%;
}

.container_16 .suffix_14
{
    padding-right: 87.5%;
}

.container_16 .suffix_15
{
    padding-right: 93.75%;
}

/* `Push Space >> Global
----------------------------------------------------------------------------------------------------*/

.container_12 .push_3,
.container_16 .push_4 { /* 3 / 12 */
  left: 25%;
}

.container_12 .push_6,
.container_16 .push_8 { /* 6 / 12 */
  left: 50%;
}

.container_12 .push_9,
.container_16 .push_12 { /* 9 / 12 */
  left: 75%;
}

/* `Push Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/

.container_12 .push_1 {
  left: 8.33333333333%; /* 1 / 12 */
}

.container_12 .push_2 { /* 2 / 12 */
  left: 16.6666666667%;
}

.container_12 .push_4 { /* 4 / 12 */
  left: 33.3333333333%;
}

.container_12 .push_5 { /* 5 / 12 */
  left: 41.6666666666%;
}

.container_12 .push_7 { /* 7 / 12 */
  left: 58.3333333333%;
}

.container_12 .push_8 { /* 8 / 12 */
  left: 66.6666666666%;
}

.container_12 .push_10 { /* 10 / 12 */
  left: 83.3333333333%;
}

.container_12 .push_11 { /* 11 / 12 */
  left: 91.6666666666%;
}

/* `Push Space >> 16 Columns
----------------------------------------------------------------------------------------------------*/

.container_16 .push_1 { /* 1 / 16 */
  left: 6.25%;
}

.container_16 .push_2 { /* 2 / 16 */
  left: 12.5%;
}

.container_16 .push_3 { /* 3 / 16 */
  left: 18.75%;
}

.container_16 .push_5 { /* 5 / 16 */
  left: 31.25%;
}

.container_16 .push_6 { /* 6 / 16 */
  left: 37.5%;
}

.container_16 .push_7 { /* 7 / 16 */
  left: 43.75%;
}

.container_16 .push_9 { /* 9 / 16 */
  left: 56.25%;
}

.container_16 .push_10 { /* 10 / 16 */
  left: 62.5%;
}

.container_16 .push_11 { /* 11 / 16 */
  left: 68.75%;
}

.container_16 .push_13 { /* 13 / 16 */
  left: 81.25%;
}

.container_16 .push_14 { /* 14 / 16 */
  left: 87.5%;
}

.container_16 .push_15 { /* 15 / 16 */
  left: 93.75%;
}

/* `Pull Space >> Global
----------------------------------------------------------------------------------------------------*/

.container_12 .pull_3,
.container_16 .pull_4 {
  left: -25%;
}

.container_12 .pull_6,
.container_16 .pull_8 {
  left: -50%;
}

.container_12 .pull_9,
.container_16 .pull_12 {
  left: -75%;
}

/* `Pull Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/

.container_12 .pull_1 {
  left: -8.33333333333%; /* 1 / 12 */
}

.container_12 .pull_2 { /* 2 / 12 */
  left: -16.6666666667%;
}

.container_12 .pull_4 { /* 4 / 12 */
  left: -33.3333333333%;
}

.container_12 .pull_5 { /* 5 / 12 */
  left: -41.6666666666%;
}

.container_12 .pull_7 { /* 7 / 12 */
  left: -58.3333333333%;
}

.container_12 .pull_8 { /* 8 / 12 */
  left: -66.6666666666%;
}

.container_12 .pull_10 { /* 10 / 12 */
  left: -83.3333333333%;
}

.container_12 .pull_11 { /* 11 / 12 */
  left: -91.6666666666%;
}

/* `Pull Space >> 16 Columns
----------------------------------------------------------------------------------------------------*/

.container_16 .pull_1 { /* 1 / 16 */
  left: -6.25%;
}

.container_16 .pull_2 { /* 2 / 16 */
  left: -12.5%;
}

.container_16 .pull_3 { /* 3 / 16 */
  left: -18.75%;
}

.container_16 .pull_5 { /* 5 / 16 */
  left: -31.25%;
}

.container_16 .pull_6 { /* 6 / 16 */
  left: -37.5%;
}

.container_16 .pull_7 { /* 7 / 16 */
  left: -43.75%;
}

.container_16 .pull_9 { /* 9 / 16 */
  left: -56.25%;
}

.container_16 .pull_10 { /* 10 / 16 */
  left: -62.5%;
}

.container_16 .pull_11 { /* 11 / 16 */
  left: -68.75%;
}

.container_16 .pull_13 { /* 13 / 16 */
  left: -81.25%;
}

.container_16 .pull_14 { /* 14 / 16 */
  left: -87.5%;
}

.container_16 .pull_15 { /* 15 / 16 */
  left: -93.75%;
}

/* =Clear Floated Elements
--------------------------------------------------------------------------------*/

/* http://sonspring.com/journal/clearing-floats */

html body * span.clear,
html body * div.clear,
html body * li.clear,
html body * dd.clear
{
    background: none;
    border: 0;
    clear: both;
    display: block;
    float: none;
    font-size: 0;
    list-style: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    visibility: hidden;
    width: 0;
    height: 0;
}

/* http://www.positioniseverything.net/easyclearing.html */

.clearfix:after
{
    clear: both;
    content: '.';
    display: block;
    visibility: hidden;
    height: 0;
}

.clearfix
{
    display: inline-block;
}

* html .clearfix
{
    height: 1%;
}

.clearfix
{
    display: block;
}

[Kishorekam]

syntax error ,",