refactoring after meeting with christian and rainer

source/RobotAPI/interface/skills/SkillManagerInterface.ice

source/RobotAPI/interface/skills/SkillProviderInterface.ice

source/RobotAPI/libraries/armem_skills/aron/Skill.xml

source/RobotAPI/libraries/armem_skills/aron_conversions.cpp

source/RobotAPI/libraries/armem_skills/aron_conversions.h

...braries/armem_skills/server/segment/SkillEventSegment.cpp

source/RobotAPI/libraries/skills/core/ProviderID.h

source/RobotAPI/libraries/skills/core/ProviderInfo.h

source/RobotAPI/libraries/skills/core/Skill.cpp

source/RobotAPI/libraries/skills/core/Skill.h

source/RobotAPI/libraries/skills/core/SkillDescription.cpp

source/RobotAPI/libraries/skills/core/SkillDescription.h

source/RobotAPI/libraries/skills/core/SkillExecutionID.h

.../RobotAPI/libraries/skills/core/SkillExecutionRequest.cpp

...ce/RobotAPI/libraries/skills/core/SkillExecutionRequest.h

source/RobotAPI/libraries/skills/core/SkillID.h

...ce/RobotAPI/libraries/skills/core/SkillParameterization.h

source/RobotAPI/libraries/skills/core/SkillStatusUpdate.cpp

source/RobotAPI/libraries/skills/core/SkillStatusUpdate.h

source/RobotAPI/libraries/skills/core/error/Exception.h