colli: add plugin dir + README file (from RCSoftX version)

First step for new "as_close_as_possible_to_original" port of colli.
Added the README file to have a better understanding of how the colli
works.
colli: add Makefile and colli_plugin.cpp file

Compiles, but no content yet :)
colli: add colli_thread, full header but empty cpp file

The modules that have not been implemented yet are commented out in the
header (basically all colli modules)
colli: init() and finalize() colli_thread

init() and finalize() is complete, at least with all that is currently
available. That includes RegisterAtBlackboard() which opens the interface,
and InitializeModules() which initializes the modules (though most of that
module stuff is disable, as the modules do not exist yet).
colli: add UpdateBB() to colli_thread and its loop()
colli: colli_thread: add abort situations to loop()
laser-cluster: use minimum distance cluster
laser-cluster: configurable cluster selection method

The cluster selection method (minimum angle or minimum distance) can now
be set in the config file.
Merge remote-tracking branch 'origin/timn/laser-cluster-min-size' into laser-cluster
robotino-sim: created working blank plugin
robotino-sim: add GazeboAspect
robotino-sim: changes in loading libs to make the plugin compile
robotino-sim: load plugin with gazebo aspect
robotino-sim: tested comm + fixed compile-problems
robotino-sim: send hello world message
robotino-sim: Sending blank MotorInterface
robotino-sim: provide interfaces
robotino-sim: Send MotorMoves to gazebo
robotino-sim: recieve gyro from gazebo
robotino-sim: write gyro to sensor-interface