docs(css): Install styledocco

Addresses #289 - this puts in the beginnings of styledocco, which can be run by typing in grunt styleguide right after grunt server is run. Subsequent pushes will feature non angular mark-up in the LESS comments so it will be seen in the styledocco documentation.

cc: @flazz 
Did you look into using any of the existing grunt styleguide tasks out there for this?

https://github.com/indieisaconcept/grunt-styleguide
https://github.com/weareinteractive/grunt-styledocco