v2.0.0: lawn_mower entity

Feature

• Adds lawn_mower entity.
• Fixes SourceType warning.
• Adds some robustness to network issues, hopefully avoiding unavailable states

Breaking changes

main-switch is renamed to auto-mow, in accordance to home-assistant/architecture#40 and home-assistant/architecture#894.
Updating to this release will re-name the entity_id and unique_id. This will keep your history and hopefully also automations intact.

	entity_id	unique_id
old	switch.{robot_id}_none	{robot_id}-main-switch
new	switch.{robot_id}_auto_mow	{robot_id}-auto-mow-switch

Renaming the entity_id will not happen if your old entity_id is something different. You are also free to manually rename it in the UI.