Subview Creators get placeholder as parameter

Pass the jquert wrapped placeholder div from to the subview
creator. This allows other data to be passed in to the creator
from the template.
Merge branch 'creatorparams'

Conflicts:
	test/tests.js
Bring debug version in line

- add "pass placeholder to subview creator"
- also add the line that handles null return from creator
Merge branch 'creatorparams'
Multiple views with same subviewCreator

Add support for optional data-subview-id attribute (subviewId) which, if
present, is used in place of subviewName as the key for the cached
subview object.  Using this, you can create multiple views with the same
subviewCreator, so long as their data-subview-ids are distinct (and
consistent).