Add Peter as contributor
Fix typo: "Retreive" -> "Retrieve".
Setting textContent to "" or null clears children.

This also includes a related fix for setting innerHTML to null.  Tests
included.

Fixes #276.
Fix handling of null for innerHTML and textContent.

Also add browser/index to test runner.
Outputs xhtml by default, with a space before />, browsers love it that way.
Wrapped callback with `process.nextTick` to avoid accidental exception swallowing.
Fix: remove unused style property which was causing explosions in 0.2.12 and node 0.4.7
Bump version; update changelog (0.2.13)
Use strict equality test for empty string.

Thanks, @FB55!
Land: Fix: jsdom.env swallows exceptions that occur in the callback (Xavi)
Land: Add: setting textContent to '' or clears children (Jason Davies)
Fix: guard browserAugmentation with a nodeunit setUp function to avoid blowing away level1 tests.
Fixed bug when config.html is a path containing spaces
vm.runInContext needs a context object, not a regular sandbox.
Add test to ensure that QuerySelector feature can be turned off
Isolate QuerySelector functions from prototype
Replace call() by apply()
Land: Isolate QuerySelector from prototype (Nao Iizuka)
vm.runInContext needs a context object, not a regular sandbox.
adding tests for contextify alternative