Fixed #SICKRAGE-APP-4BN - can't compare datetime.datetime to datetime.date when in display show view

Fixed #SICKRAGE-APP-4BS - not enough values to unpack (expected 2, got 1) error when trying to retrieve scene exceptions by season

Refactored code for adding new/existing shows, removed auto-detection of XEM scene numbering as it was falsely setting scene numbering to ON.

Refactored requirements install cmd to include `--no-cache-dir` flag when ModuleNotFound exception is thrown

Refactored application startup to install requirements via pip if ModuleNotFound exception is thrown.