Implementation of Promises/A+ (http://promises-aplus.github.com/promises-spec) for Sencha Touch 2 that passes the test suite (http://github.com/promises-aplus/promises-tests).
Ported from RSVP.js (http://github.com/tildeio/rsvp.js), embeded/simplified EventTarget plus some fixes to pass the test suite.
See RSVP.js documentation for usage examples.