Small patch, better README, areNeighbors()

[possibly]

1. Small fix on a function name, it was:

Fixed2DArray.prototype.getColumn = function getRow( ... ){ ... }

2. README now has better formatting for the forEach method
3. New function areNeighbours(x1,y1,x2,y2,[, distance]) that will return true or false depending on if the given coordinates are neighbours.

npm run test

> fixed-2d-array@1.1.0 test /Users/tbro/dev/fixed-2d-array
> node test/test.js

TAP version 13
# Default values
ok 1 should be equal
ok 2 should be equal
# getHeight and getWidth
ok 3 should be equal
ok 4 should be equal
# get and set
ok 5 should be equal
# get correct row and column
ok 6 should be equal
ok 7 should be equal
ok 8 should be equal
ok 9 should be equal
ok 10 should throw
ok 11 should throw
# forEach
ok 12 should be equal
# exception on index out of bounds
ok 13 should throw
ok 14 should throw
ok 15 should throw
# get correct number of neighbours
ok 16 should be equal
ok 17 should be equal
ok 18 should be equal
ok 19 should be equal
ok 20 should be equal
ok 21 should be equal
ok 22 should be equal
# areNeighbors
ok 23 (unnamed assert)
ok 24 (unnamed assert)
ok 25 (unnamed assert)
ok 26 should throw
ok 27 should throw
ok 28 should be equal

1..28
# tests 28
# pass  28

# ok

npm run jshint

> fixed-2d-array@1.1.0 jshint /Users/tbro/dev/fixed-2d-array
> jshint test/* lib/*

npm run test-coveralls

> fixed-2d-array@1.1.0 test-coveralls /Users/tbro/dev/fixed-2d-array
> istanbul cover test/test.js  && cat ./coverage/lcov.info | coveralls && rm -rf ./coverage
...
=============================== Coverage summary ===============================
Statements   : 100% ( 64/64 )
Branches     : 100% ( 22/22 )
Functions    : 100% ( 11/11 )
Lines        : 100% ( 62/62 )
================================================================================
...