Scan for new episodes functionality

[joda]

It would be great to have Sapphire check with tv-rage whether a new ep of a certain series has aired. This could either be another scan option on the settings screen or a background process initiated everytime a each series is opened; with a cap of say, checking once every hour or something.

The series with new eps could be highlighted in the virtual directory by an icon in the same way the oscars/top250-titles are. This all should of course be a togglable option.

[gbooker]

#14