Add watch-tests and server-test-watcher tasks to Gruntfile to enable live reloading of test pages when developing.
Automatically open test page in browser using xdg-open.
Rename server and watch task to livereload-tests.
Specify watch:tests directly in concurrent to avoid issues when renaming.
Remove  watch-tests grunt task  since it shouldn't be used and use google-chrome to open the test URL instead of xdg-open for better support.
Just specify the URL to open, don't specify what app to use or a callback function.
Merge pull request #32 from Mark-Simulacrum/unit-test-livereload

Add watch-tests and server-test-watcher tasks to Gruntfile to enable liv...