PEP8 fixes
Add zap2it to mede8er's metadata, only show id if populated.
Add xml declare when writing .xml files (apparently mede8er requires it..)
http://www.mede8erforum.com/index.php/topic,15386.0.html / www.sickbeard.com/forums/viewtopic.php?f=4&t=9634
Merge pull request #897 from thezoggy/dev--metadata_updates

metadata updates