Build *custom build of RxJS 5*, a custom Observable with added (patched) operators on streams (eg 'map', 'filter' etc), and static methods attached to Observable (like 'Observable.fromEvent')
Convert AMD & commonjs modules to UMD, AMD, commonjs or `combined.js` (rjs & almond) & run/test on nodejs, Web/AMD or Web/Script. Manipulate & inject module code & dependencies while building & more