changed readme
Removed database installation gem
Added bin folder
Corrected the Gemfile to add postgres
Corrected CSS
Activate statis assets
added sprockets
Changed the stylesheet extention
Added rails_12factor gem
Used helper to retrieve the images
Used helper to retrieve the images
Solve conflict
Correction of image format
Merge branch 'master' into development
Added RSPEC and tests for models
Added first UT