Changes Ruby Manager behavior

RVM recommends the .ruby-version syntax instead of .rvmrc
Updates httparty dependency

- updated failing spec tests due to stricter JSON format
Merge pull request #6 from miketheman/ruby_manager

Updates ruby version manager behavior
Merge pull request #7 from miketheman/updated_httparty

Updates httparty dependency
Added travis-ci yml file, remove broken cookie auth spec to prepare for deprecation
Add travis status to README
Ignore binstubs directory
Fix link to travis-ci