Some optimization to hash and equality checking
Combining selectors after we trim them.

This is a significant speed boost for the same result
Adding ruby-prof for some performance optimization
Fixes an edge case with multiple comments/selector

Previously the last comment was considered part of the selector
Adding a just_parse.rb file for help optimizing the parser

Right now performance is swamped parsing the full css. This will let me
work on optimizing the parser without dealing with the redundancy
checking