Add check if season thumbs exists before download
Return only True if all season_thumbs are saved
WindowsError is a subclass of OSError and need not be excepted

This fixes bug 2254: https://code.google.com/p/sickbeard/issues/detail?id=2254
Minor changes to pull before new build.
Tweak RawHD regex to accept mpeg2 and mpeg-2 in the filename.
Add missing ek.ek wrap around isdir check that was reported on the forums:
  http://sickbeard.com/forums/viewtopic.php?f=4&t=6829#p32324
PEP8 whitespace cleanup for postProcessor.py while I was at it.
Prevent NameError on Linux
Implement robots.txt to keep web crawlers out. -- Borrowed from SABnzbd :)
Merge pull request #657 from thezoggy/dev--more_tweaks_and_fixes

Minor changes to pull before new build.
Bugfix :: loadFromTVDB : Prevents corrupted data from TheTVDB
tv_shows.show_name in sickbeard.db can never be a NoneType. Patch prevents this from happening if someone has removed the seriesname attribute in the TVDB show entry.
Bugfix :: tvrage.py : Handle "No Show Found" on TVRage.
Merge pull request #682 from Conjuro/TVRage-No_show

Bugfix :: tvrage.py : Handle "No Show Found" on TVRage.
Merge pull request #681 from Conjuro/Bugfix-show_name-None

Bugfix :: loadFromTVDB : Prevents corrupted data from TheTVDB
Merge pull request #654 from depassp/bug-2254

WindowsError is a subclass of OSError and need not be excepted
Merge pull request #409 from itofzo/fix_season_tumbnails_dev

Fix season tumbnails always downloading