Fix: Weight is null when adding a new block

Related to view refactoring where we unify add and edit views.
Closes #479
Fix: Remove unclosed and unnecessary form->create() call

The presence of the form tag was causing the first delete link in index
not to work.

See: http://croogo.lighthouseapp.com/projects/32818-croogo/tickets/482-taxonomyterms-cant-delete-first-term-in-index#ticket-482-4

Closes #482
Fix: Avoid `ambiguous column` errors

This might happen if a behavior 'injects' a relationship.
Make the field explicit by passig it through escapeField()
Fix: Deleting a Term does not delete associated records

Closes #484
Adding docblock and amend tests

Updated test as per #483
Various CS fixes

- Add missing space
- Remove extra space
- Indentation fixes
CS Fixes: Templates
Merge branch '1.5-cs-fixes'
Merge branch 'master' into 1.6

Conflicts:
	Plugin/Comments/View/Comments/rss/index.ctp