Properly Object-oriented Forms class

[jlbooker]

Create a properly object oriented forms class.

This needs more planning and discussion to nail down the API.

┆Issue is synchronized with this Asana task

[Stardog]

Please review Globals/Form.php

[jlbooker]

Also, we need to add support for the 'optgroup' element in select elements. For an example of where this comes in handy, see: http://harvesthq.github.io/chosen/

[Stardog]

Those are nice.