add ruby-2.1.0 to travis.yml
remove ruby-1.8.7 and ruby-1.9.2 support
let rubygems do it's job
- Removes `backup dependencies` commands.
- `gem install backup` will now install all required gem dependencies.
- `gem cleanup` will no longer silently remove our dependencies.
- Versions for all gem dependencies are now locked to ensure stability.
start testing against ruby-2.0.0
remove 'develop' branch from Travis CI
Added Travis CI.