Added noConflict method and test.

Also wrapped lib to prevent leaking globals.
Merge pull request #7 from firstandthird/feature/2-noconflict

Added noConflict method and test.
Merge branch 'master' into feature/5-pass-in-timestamp

* master:
  Added noConflict method and test.

Conflicts:
	.gitignore
	lib/relative.js
	test/relative.test.js