Initial coveralls setup
Added simplecov to filter covered files
Added coveralls badge to readme
Use old hash syntax in Gemfile for Ruby 1.8 compat

We can't drop 1.8 compatibility because it's a default on older systems and I want to keep CoffeeTags as easy to install as possible
Remove 1.8.7 and 1.9.2 support in test matrix
Merge pull request #44 from lukaszkorecki/coveralls

Coveralls code coverage integration with travis ci