Started work on page duplication
Renamed 'duplicate' to 'copy'
Implemented recursive copying
Page copy now copies child objects
Fixed bug causing child objects of child pages to not be copied
Minor cleanup
Make sure we have the most specific version of a page before copying child objects
Changed **kwargs to update_attrs
Merge branch 'page-duplication' of https://github.com/kaedroho/wagtail into kaedroho-page-duplication

Conflicts:
	wagtail/wagtailcore/tests/test_page_model.py
Merge branch 'kaedroho-page-duplication'
Merge branch 'master' of github.com:torchbox/wagtail