added support for the json-schema 'extends' property (refs #122)
added support for the json-schema 'extends' property (refs #122)

remotestorage/remotestorage.js,remotestorage/remotestorage.js,mcanthony/remotestorage.js,lewisl9029/remotestorage.js,untitaker/remotestorage.js,theWebalyst/remotestorage.js,theWebalyst/remotestorage.js,untitaker/remotestorage.js,remotestorage/remotestorage.js,lewisl9029/remotestorage.js,mcanthony/remotestorage.js