FIX urlrewrite_torrentleech bug NONType contents

Add size Terabyte to size parser
Get back function validate_config() webui need
Merge pull request #279 from Shorny/master

FIX urlrewrite_torrentleech bug (NONE Type contents)
Merge commit 'e985871f6f97bbc2bb3b3e990c8bad7e753073d0'
Merge commit 'b7878a4a9f6d68bb169c355686b02a6079d128f2'
To not append the extension to directory name

About http://flexget.com/ticket/2633
Merge commit 'b8c2f083132c20587708af291a21ddfb2935693b'