Backport from https://github.com/thezoggy/Sick-Beard, applied to our branch
General cleanups in notifiers.

* Cleaned up notifier ui page wording so they follow similar pattern.
* Better exception handling for pyTivo and NMJ
* Cleaned up logging entries, trying to standardize on what level we report and verbiage (not using contractions, prune out duplicate/excessive entries)
PEP8 cleanups