upgrade node to 0.10
upgrade packages - closes #10
upgrade npm version
add grunt-cli install for travis
remove node 0.6 support
test for header removal
use _omit() to remove headers
flesh out the test for header passing
upgrade mocha
add missing grunt-contrib-watch dependency
Merge remote-tracking branch 'origin/master' into node-0.10

Conflicts:
	package.json
support node 0.8+