Use local variables for API key.
Merge pull request #23 from vtoulemonde/env_variable

Use local variables for API key.
Use Amazon S3 and fog to upload and store pictures.
Add the name of the Amazon S3 bucket in the local variables.
Merge pull request #24 from vtoulemonde/upload_picture

Upload picture
Delete migration that drop column picture_file_name from photos table because this column does not exist.
merged changes with Amazon S3
added api keys
Replace README.rdoc file with READM.md file
Correct bug on add/remove favorites.
Delete unused js and css files.
pull upstream master 20141118