cfg: add initial competition configuration
controller: reduce required gtk version
viewer: reduce minimum required gtk version
clips: allow clients to command drilling machine
clips: allow clients to command conveyor belt
controller: add buttons to command devices
controller: control devices by gui
cfg: adapt shell configuration for competition
Merge branch 'rockin' of ssh://refbox/home/rockin/rockin-refbox-bare into rockin
plugins: convert camera image before sending
plugins: send image only after successful receive
Merge branch 'rockin' of ssh://refbox/home/rockin/rockin-refbox-bare into rockin