Button Overrides Part 1

Added Part 1 of Button Overrides Request: #6

• You can now override any button with a Home Assistant Script (see documentation)
• YAML based scripts will be coming in part 2

Added app shortcuts:

• Bell Fibe TV (Canada) @clinds34 #6
• BBC iPlayer (UK) - (needs community sign-off ) @Scoff123 #5

Fixed button press animation scale issue when Firemote was not set at
100% scale

Began Device Type exhaustive list setup

Added support for Fire TV Toshiba V35

Fixed Power On / Power off issue for Fire Stick 4K 1st gen 2018