Clear changedFiles after triggering livereload. Closes GH-193.
Test to ensure files are reloaded only once. Closes GH-195.
cwd option now accepts separate files and spawn cwd settings. Closes GH-125.

Conflicts:
	test/fixtures/multiTargets/Gruntfile.js
nitpicky clean up
Docs for cwd option
Fix to make interrupt work more than once. Closes GH-155.
Make finicky test more reliable