Don’t wrap the result of $template in an array; lets $template be used in a $test

The beginnings of some documentation.

Don't run `$children` when data doesn't exist.

Don't run `$template` without a `$key` or when there's no data for the `$key`.

Add support for iterating through objects with `$children`.

Major API change, more/better functionality. stencil directives are now prefixed with $, in the style of MongoDB. Docs forthcoming.

Added a concatinator! Closes #1.

Handle cases where a key in data is null (was already handling cases where it is undefined).

Removed unfinished binding code from master.

Merge branch 'master' of github.com:Sidnicious/stencil.js

Updated `jquery-haml` to Sidnicious/jquery-haml@abb4b313659516e5a42f

Added `{ key:"key", template:[…] }` syntax to support nested objects (e.g. `stencil(['#location', {key:'location', template:[{key:'longitude'}, ' / ', …]}], { location:{ longitude:"…", latitude: "…", altitude:"…" }})`).

Updated some `Trapper.js` integration code.

Now on the jQuery object!

Add an example.