Compatibility with new-style metadata in Nikola v7

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Split the plugins site into v6 and v7, as sanely as possible.

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Merge branch 'new-style-meta'

Conflicts:
	v6/orgmode/orgmode.py