Ensure JSON exists for IE 7 browsers.
Ensure build fails on broken Sauce Labs.
Merge pull request #25 from tbranyen/fix-ie

Fix the build process so that IE 7 is tested correctly.
Added in default encoding and new raw prop.

The default encoding for properties will be be encoded to help alleviate
issues arising from XSS attacks.

If you wish to avoid this inconvience in your code, you can use the new
triple curley bracket notation to render the raw property:

    {{{ rawProperty }}}
Better code coverage by testing raw and encoded filters.