nova.py: Remove DOCUMENTATION block

@mpdehaan said that nothing uses them at
https://github.com/ansible/ansible/pull/7988#issuecomment-47600006
Correct typo: 'additioanl' -> 'additional'
Correct typo: 'receords' -> 'records'

I should read more than a sentence at a time when I'm correcting typos—sorry for the typo correction spam ;)
nova.py: indented and sorted JSON output
CHANGELOG and other updates for 1.6.6 release
Merge pull request #7993 from msabramo/nova.py_Remove_documentation_block

nova.py: Remove DOCUMENTATION block
Merge pull request #7994 from adamnbowen/patch-2

Correct typo: 'additioanl' -> 'additional'
Merge pull request #7995 from adamnbowen/patch-3

Correct typo: 'receords' -> 'records'
Merge pull request #7996 from msabramo/nova.py_JSON_indented_and_sorted

nova.py: indented and sorted JSON output