Added wrappers for global.setImmediate and process._nextDomainTick.
Merge remote-tracking branch 'carter/master'
Wrapping emitter.listeners. Callers of emitter.listeners will now get an array
containing the original callbacks rather than the wrappers.
Merge pull request #14 from mbertoglio/master

Added wrappers for setImmediate and _nextDomainTick