New Feature: PVR provider type along with support for NextPVR

[kelliott72]

I decided to add in support for pvr software as a new provider type. I find it useful for less popular shows that aren't typically available via nzb or torrents - kids shows, cooking, news etc. Sick Beard now manages those recordings too. I put in the framework generically for a pvr provider type, although currently NextPVR is the only app supported.

In a nutshell - once per day this will check the EPG data from NextPVR via its REST interface and schedule any missing shows. Shows are not marked as snatched at this point. The code will attempt to pick a later recording date than the first air date (if multiples exist) to allow a download to occur since that is preferred. If the same show is downloaded, you have the option to have the scheduled recording cancelled if it hasn't recorded or deleted if it has. You also have a couple of options based upon channel number for determining if the recording will be SD/HD.

This is basically my first python code as well as my first github project, so hopefully I did all of this right. I've had the code running for about 2 months now and it's been very stable.

There's a little bit of additional info on configuration listed in the readme of the fork - https://github.com/kelliott72/Sick-Beard