Add save, restore, and remove layout support (closes #32)

- Added save_layout, restore_layout, remove_layout commands
- Added Origami.sublime-settings file
- Added Origami to Preferences > Package Settings menu
- Added README and Keybindings to Origami menu
- Updated CONTRIBUTORS file
Adding needed save method for sublime-settings
Merge pull request #64 from 23maverick23/feature/issue32

Add save, restore, and remove layout support (closes #32)