New API.
.
Changed: add_behavior and load_behavior have been integrated.
New example: line_follower
Moved files to example sensor_signalling
Fixed symlinks, paths are now relative.
New feature: Unified behavior event output
API change: inhibition and suppression now take event descriptors.
Changed device.name.event.event_name to device.name.event_name.
Polling for device functions is done only once now.
Wait for toribio device using a table filter is now possible.
Modified: An event stops being inhibited if every inhibition is release. A behavior can only release its own inhibitions and suppressions.