Update README with battery check interval details

Added a note about battery check interval and its limitations.

Corrected the logic for deletion of timers and increased the max time…

…rs to 16 per blind.

Readme and tests

Merge pull request #116 from pink88/DiscoveryFixes

Discovery fixes

Better handling to stop false positive movement

Removes false discovered devices.

Merge pull request #108 from pink88/AutoBatteryChecks

Option to automatically check the battery on the first movement within a configurable period

Merge pull request #108 from pink88/AutoBatteryChecks

Option to automatically check the battery on the first movement within a configurable period

Merge pull request #103 from pink88/1.12.1dev

Fixes missing asyncio import

Merge pull request #101 from pink88/1.12.1

Some more error handling on failed connection/timeouts.