Inline loops

[roboshoes]

As discussed in #9 there are simples _foreach loops so far. However those loops require to use a external file. I find myself to run into situations where I want to loop over a set of values but only bake a single line for each value. It seems cumbersome to create a seperate file for that.

For example:

<ul>
    <!--(bake menu/line.html _foreach="value:menu.items")-->
</ul>

with the menu/line.html being:

<li>{{value}}</li>

There should be an inline version like so:

<ul>
    <!--(bake-inline menu/line.html _foreach="value:menu.items")-->
        <li>{{value}}</li>
    <!--(bake end)-->
</ul>

Not sure about the syntax. Any suggestions?