Bug 784739 - Switch from NULL to nullptr in mfbt/.  r=jwalden
Bug 894026 - Implement ES6 binary and octal literals.  r=till
Bug 896124 - Implement a JS_Init() JSAPI function, to be called before any other JSAPI operations are performed, to centralize whole-engine initialization tasks.  r=bsmedberg for the XPCOM bits, r=luke for the JS bits