Create small and thumbnail versions of images on upload.
Clean up carrierwave config file.
Show thumbnail previews in block edit page.
Show small preview in image layer edit screen.
Show start and end scroll positions in block edit page.
Show layers in block edit page ordered by scroll start.
removes Gemfile.lock from the source
Merge pull request #23 from Originate/remove_gemfile

removes Gemfile.lock from the source
Remove Gemfile.lock from git cache to allow clean merge to master.
Merge pull request #19 from dhawt/image_layer_improvements

Image layers have previews
Merge pull request #22 from dhawt/sort_layers_in_block_editor

Show layers in block edit page ordered by scroll start.
Merge changes from master and manually fix conflicts.