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.
Fix the undefined JSON issue within Karma.
Fix some minor style issues with encode module.
Finished security section.
Potential fix for IEs.
Merge pull request #24 from tbranyen/encoding

Added in default encoding and new raw prop.