Added Support for ghost asset based content discovery.

Perhaps there is a much better way to handle this but this is m attempt at  supporting Ghosts asset based handlebars anontation.  

Goal to support handebars expressions such as:
{{asset "js/normalize.css"}} 

  * I decoupled the actual render string from the string used for configuration of destinations.
  * Added some ignores for my ide of choice

Hardcoded to expect {{asset Not the best way to solve the problem generically but i feel that was way out of scope for the changes that i needed.

Changed the regular expressions to be able to handle spaces inside of the replace path.