added grunt test task for node unit tests
update package.json so npm test will trigger test grunt task
added test commands to readme.md
added test commands to readme.md
Merge branch 'testing-testing' of github.com:andrewjmead/grunt-script-link-tags into testing-testing

Conflicts:
	readme.md
added travis ci
Merge pull request #4 from andrewjmead/testing-testing

added grunt test task for node unit tests