Added a lot of code for dynamic definition of interactive objects, and for dynamically populating the context menu for objects
Simplified usage of the marker setup a bit; also, removal of menu entries working
Forgot to remove a faulty `break;'
Subscribe to internal events; also, infrastructure for interpreting object add events and updating their pose is prepared
Allow adding objects for interactive use through events; proper interactive callback handling through events; fixed a bug that would try to shutdown an (non-existing) experiment prior to the first one
Implemented a PLUGIN_CLASS macro to make plugin class name definition in source files easier
Build skeleton experiment knowledge plugin
Add experiment-knowledge plugin details and fix the config file so it works on older libconfig-versions
Enable to export a linear symbolic plan log path instead of only the whole tree