upgrade support paperclip 3.5
Merge pull request #2 from LYY/master

upgrade support paperclip 3.5
Allow all minor version upgrades of Paperclip 3.x
Do not lock Ruby to a specific patch level
Lock down dependencies more precisely
Try creating the tmp directory before Travis builds
Remove tmp dir generation, run RSpec with full stacktraces
Update to image_optim 0.9.1
Add a CHANGELOG
Update to Paperclip ~> 3.5.2
Include a reference to image_optim_bin for Heroku users
Update CHANGELOG
Version 1.0.0