Added avatar column to users, set up carrierwave to upload and display avatars
Tests passing for user uploads avatar and avatar displays
Cleaning up syntax per hound
breaking tasks into do blocks
Merge pull request #37 from LaunchAcademy/carrierwave

Carrierwave
removed repeated test images
Merge branch 'master' of github.com:LaunchAcademy/food_trucks into change_coverall_coverage