Coverage with Istanbul and Coveralls.

Closes #94.
No longer testing Node.js 0.6 at Travis CI.
Generate all coverage reports.
Quiet `t/cover`.
Quiet `t/test`.
Event generator requires event name.
Add Coveralls chicklet to `README.md`.
Fix Coveralls chicklet in `README.md`.

It was incorrectly referencing Stencil's coverage.
Reintroduce Node.js 0.6 testing to Travis CI.
Attempt to tidy `README.md`.
Notes on inverse futures.
Test against Node.js 0.10 at Travis CI.
Notes on events and Node.js domains.
Upgrade Proof to 0.0.28.
Merge branch `master` into `travis-ci`.

Conflicts:
	.travis.yml
	t/cover
	t/test