Add timeStamp to instrumentation event

The timeStamp holds the UTC UNIX timestamp when the instrumentation
event has been created.

This closes #138
Merge pull request #139 from pangratz/add/timeStamp_to_instrumentation_event

Add timeStamp to instrumentation event
tidy up the constructor
Adjust instrumentation to only work via the RSVP namespace

This should satisfy @domenics OCD.
be slightly less paranoid
Reuse previously introduced `now` helper to get current timestamp
Merge pull request #140 from pangratz/massive_guid_performance_improvement

Reuse previously introduced `now` helper to get current timestamp
RSVP.async and the internal config.async should always be the same.

- remove asyncDefault
tidy-up denodeify

- it should use idiomatic Promise Construction
- an optional binding at denodeification time.
tidy-up and reuse helpers
update es6 module transpilar

- needed to update the loader to support relative requires
Update README.md
adds Promise#race