Misc fixes & improvements

[0x2142]

Running list of things to be included in v0.3.5

So far:

• Fix notification templates not being included in binary release
• Add from and ignoressl options to SMTP notifier
• Add event/zone data caching to facilitate better determination on which zones already generated an alert
  • Previously this was done based on a simple comparison of current_zones to entered_zones, and notification would be sent if there was no matching zone in entered_zones - which assumed that the zone was new
  • However, there are cases where a zone may already be contained within entered_zones but notifications dropped by Frigate-Notify for other reasons
  • New behavior creates a local cache to track when notifications have actually been sent on a particular zone
• Allow webhook notifications to include HTTP parameters & support sending notifications via HTTP GET
  • Default is still POST

More to come...

[0x2142]

Going to merge this into dev for now so fixes are available for testing. Still more to come before v0.3.5 release though!