Hardcoded umask removal 

Removed hardcoded umask of 077 which was causing my postprocessed files to end up with permissions of 700 - I would rather control the umask myself within the system. As far as I'm concerned the data created by SB isn't in need of such strict permissions anyway & the chances are you're going to want some other apps which are running as other users on the system to at least read the files that Sickbeard has created. And besides, umask is something to set within your OS.

I would normally just deal with this in my own checkout, but I noticed another user has the same problems on the Sickbeard forum at http://sickbeard.com/forums/viewtopic.php?f=4&t=8030 so thought it might be worth sharing.

There is also some chmod & chown functionality within helpers.py which may be less relevant if it's no longer working within such a restrictive umask, but I've left that as is or now.