[Form] Removal of options in FieldType

[weaverryan]

In 2.1, FieldType is deprecated. It still exists, but all of the options are now on FormType. So, we need to move the options found here http://symfony.com/doc/current/reference/forms/types/field.html into the form reference.

As a side note, once we've got all of these options in one spot, we need to somehow include them at the bottom of every form field type. Right now, if you look at a normal form field type (e.g. http://symfony.com/doc/current/reference/forms/types/text.html), you're not aware of most of the options that are available.