Fix specs with rails 4
No need for an Engine
Fix bundler + gemspec configuration

Using bundler + gemspec means `git ls-files` can't be used when testing new files.

Additionally, the spec files don't *require* bundler to run, so instead we can just `bundle exec rspec` to lock down the gemset then run as normal. Bundler makes sure our gem is already in the load path.
Merge pull request #8 from sj26/remove-engine

Remove engine
Update combustion
Include Gemfile.lock
Fix extending a blank view

Fixes #9
Remove trailing whitespaces
Removing redundant cumbustion files
Fix intendation
Changed hash syntax to 1.9 format since we drop 1.8 support
Drop support for ruby < 1.9.3
Added some readme about supported ruby versions
Fix rdoc task
Version 0.5.0
A bit of codestyle goodness for a private method
Apparently html_safe is safe
Properly initialize bundler in Rakefile
Require bundler in spec helper as well
Add warning about caching to readme

closes #10