Freezer Versions Save

• Fixed specialEvents problem in build
• Not triggering events in all parents when a node have more than one parent.

• Added beforeAll and afterAll events.
• this in event listeners now point to the current freezer object.
• Fixed Freezer.prototype.set not working with plain objects.
• Fixed some typos in README.

Fixed set not accepting numerical keys.

once now returns the listener/freezer object.

• now returns the current node, like any other updater method.
• Fixed nodes losing the live mode on update. Thanks to @zenfe.
• Fixed nodes triggering event in the wrong order when pivot. Thanks to @zenfe.
• Tests passing now in Node 4. Thanks @kuraga.
• Adds setting properties to undefined. Thanks to @rsamec.

Fixes now triggering events twice. Fixes live mode not triggering events in the intermediate nodes. Removed some console.log methods.

Adds now and pivot node methods.

• Fixed binding parents to the nodes on reset.
• Fixed not removing an specific listener when using off.

Added options to freezer initialization. Added mutable option in order of create mutable freezer objects. Added live mode option.

• Fixed reseting top nodes not updating the store
• Fixed some == comparisons that would modify incorrect attributes.
• Fixed modifying the object passed to set as argument.
• Added the playground to the readme file.