Fix require_movement failing when old state is missing GPS data (pnbr…

…uckner#6)

Keep last valid last_seen & GPS data for individual input trackers, even if ultimately not used. Check that last_seen does not go backwards. For GPS-based trackers don't use update if nothing has changed.

Ignore warnings for entire initialization period (until EVENT_HOMEASSISTANT_START.)

Add optional require_movement configuration variable & bump to 1.10.0 (…

…pnbruckner#2)

Bump timezonefinderL to 4.0.2 and version to 1.9.0

Add files and bump version to 1.8.0 (pnbruckner#1)