Test: Move A+ test adapter into support/
Test: Extract testConstructor util into proper assertion
Test: Use fake timers from Sinon directly

setImmediate() workarounds are no longer necessary, and the helper isn't used so often that we need it.
Test: Reference blessObject/extendConstructor directly
Test: Fix title of extendConstructor test
Test: Update Mocha integration

* Bump version, use native Promise support
* Use a mocha.opts file, removing crappy test runner
* Rename test files
* Use global `assert` and `sentinels`
Test: Use a Thenable class when thenables are required
Merge pull request #10 from novemberborn/refactor-tests

Refactor tests