Upgraded manifest to version 2.
Enabled strict mode in JS and fixed implied global variables.
Removed debug console.logs and commented code.
Added analytics background script.
Added opts module & tests.
Fixed regression with keyboard shortcut.
Updated changelog and version number.
Fixed default of collapse results option. Updated change log
Added analytics implementation & tests.
Merge github.com:renyard/validity into v2.0

Conflicts:
	build.xml
	src/background/controller.js
Renamed analytics.js to stats.js.
Implemented _load() and _save functions in opts.js.
Added version to pageview tracking.
Fixed tests to run under PhantomJS.
Added tests and implemented upgrade.js.
Added regex to containsHost and updated tests.
Updates to stats module. Added strings file for en_GB.
Updated QUnit submodule.
Added Grunt and npm configs. Fixed unit tests for net module.
Merge branch v2.0 of https://github.com/renyard/validity into v2.0
Removed i18n.js from manifest.