add chainingAsync skill to test async calling of skills

added utility to run subskills from within a skill so that automatically onStopRequested and onTimeoutReached are called. Skill Proxy has been moved to core package of skills.

split example skills in seperate files

remove getLatesNUpdates from skillsMemory interface as the same behavior can be reached through getSkillStatusUpdates(). Added methods to coreSegment.

added skillExecutionRequest to memory when skill is asyncronolously called

adapted some aron visitor stuff for type visitors (similar to data visitors)

added componentplugins for skillmemory server, started to implement important functions for skillproviders