cropped images now saved; added button to switch between sim and sam
edited samlite code to work with coffeescript
added cropped images to sim layer
tried to merge amandas code which moves her cropTool out of my coffeescript file
fixed up syntax in model, still not concept-tested
allowed some db fields to be blank
added user login functionality
fixed up field defaults and unicode methods
abstracted AnimationFrames and Sprites to ImageWrapper, the save_frame ajax call is now save_image and has a different set of parameters
resolving merge conflicts