Adjust copyright information

Include list of contributors in README, adjust copyright-information and
email-addresses.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Add IR based motion source

Allow using the IR cam as motion source. Only the left-most IR source is
used for now. Better IR support can be added later.

(adjusted coding-style and IR-source detection)
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>