Removed embedly filter
This has been deprecated since <0.1 so I think its time for it to go now
Merge branch 'remove-embedly-filter' of https://github.com/kaedroho/wagtail into kaedroho-remove-embedly-filter

Conflicts:
	wagtail/wagtailembeds/tests.py
Merge branch 'kaedroho-remove-embedly-filter'