Adding an HTML field that is only available through code.
UF_Datastore_Postmeta will return NULL if a value is not set. This way checkboxes and default values will work.
Modified UF_Field_Checkbox to check for the proper value when retrieving from a datastore.
UF_Postmeta is not calling save when a new post is being created (the draft).
Made a few minor changes to allow Ultimate Post Types to work properly.

git-svn-id: https://plugins.svn.wordpress.org/ultimate-fields/trunk@976746 b8457f37-d9ea-0310-8a92-e5e31aec5664