Form Fixes

[asabhaney]

Completed

• Ensure form components work regardless of uglify options (convert form components to stateful components to ensure they are not read-only)
• Ensure all form components can be used standalone (without Form or groups)
• Handle componentWillReceiveProps correctly for all form components
• Updated styling of checkbox and radio
• Remove invalid event persistence (see: https://facebook.github.io/react/docs/events.html#event-pooling)

Future PR

• Ensure form components work regardless of mangle options (see problem here)
• Ensure values are always correct
• Clean up and simplify Form component logic (deprecate recursive tree traversal)
• Ensure form data serializes correctly on submit

[stevenyuen]

Looks good. I've also tested with Communities as well.