Capitalize player names when saving
Improve formatting of user names, and fix bug where "Anonymous" third player would show up in two player games
Implement save-to-gallery

- create core-data GalleryStore and backing classes GalleryArtist and GalleryDrawing (ObjC, unfortunately)
- create Match render()->UIImage method
- add UIImage resizing extension
- add Lilliput.ByteBuffer toNSData extension