Add weakset functionality
Add gitignore, replace builder with closurecompiler

Closurecompiler gives the maximum possible compression
Rename build to dist

Dist is considered as a more common practice for placing bundles
Replace tests with mocha

Mocha allows to debug things the way better: it is able to turn on/off
specific tests and shows the lines of code where errors took place
Refactor code

Replace `Object.create`s with prototypal shared methods - it is
considered to be hundreds of times faster
http://jsperf.com/object-create-method-vs-prototype-method.

Move all polyfill-related tasks out.

Reduce clutter and optimize code for closurecompiler.
Add testling settings
Fix tests

Make tests pass
Update readme
Add testling table
Update package
0.3.0
Update README.md
Update README.md
Minify & update README
0.3.1
Merge pull request #9 from dfcreative/master

0.3.1