Add missing package, update existing

Use caret notation for version, see http://fredkschott.com/post/2014/02/npm-no-longer-defaults-to-tildes/
Add new grunt task for minifying with uglify.

and switch to using \n as a separator
Three typos in the readme
Merge pull request #84 from DieBuche/readme

Update readme, build packages
Merge pull request #83 from DieBuche/performance

Two small performance improvements
Merge pull request #81 from DieBuche/selectorFunctions

Add methods to group to select children based on id or class
updated builds
Fix  a lot of undefined, unused or shared vars
Merge branch 'refs/heads/varCleanup'

Conflicts:
	build/two.clean.js
	build/two.js
	build/two.min.js
	src/two.js