rake task creates/installs coffeescript.syntax

The ultraviolet gem doesn't work with Ruby 1.9, instead we need to use the updated 'spox' versions of these gems: spox-ultraviolet, spox-plist

This new rake task: 

    rake install_coffeescript_syntax

loads either the original gems if running Ruby < 1.9 or the 'spox' versions if running on Ruby 1.9.x.

The task then uses he selected plist gem to generate the ruby object and writes the yaml syntax file directly into the correct location into the selected ultraviolet gem.

If acceptable this would replace the cake task: `build:ultraviolet`