removing spaces
Removing some gems that are not in use. Added simplecov and letter_opener
configuring letter opener
changing image processment gem: MiniMagick instead of RMagick. Check more details [about MiniMagick](https://github.com/minimagick/minimagick)
rails updated to version 3.2.14
rspec-rails updated: version 2.14.2
removing unused specs/files
.travis.yml update to use ruby 2.0.0
turning back better_errors in a better(and newer) version: 0.9.0
Merge pull request #172 from playthecall/gems_maintenance

Gems maintenance