armem_robot_state: updates

Changes:

• RobotReader: implemented getRobotJointState
• VirtualRobotReader: synchronizing robot when new one is requested
• new class VirtualRobotHelper that provides additional information e.g RobotInfoNode that is not part of the VirtualRobot::Robot data structure

requested review from @fratty

assigned to @fabian.reister

changed title from new class VirtualRobotHelper that provides additional information e.g... to armem_robot_state: updates

added 3 commits

• 0b0fbb28...7a661313 - 2 commits from branch armem/dev
• 4fb829bf - Merge branch 'armem/dev' into feature/armem_robot_state_update

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added 1 commit

• a9559e49 - distinguishing between getRobot and getSynchronizedRobot

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added 13 commits

• 42dc4c2d - Merge remote-tracking branch 'origin/master'
• ff6abd95 - ArViz: scoped client that automatically cleans up layers when destroyed
• 200a2a44 - viz::Box: initializing pose if not set explicitly
• 33c50719 - armem/util: fixing include order
• 988e83af - typo
• d7959070 - VelocityControllerHelper: changing VectorXf to Vector6f
• e7951fc6 - Merge branch 'feature/some-minor-chages' into 'master'
• 27dd7ff3 - Update ScopedClient.cpp
• 78a1e1ed - Merge remote-tracking branch 'origin/master' into feature/arviz_scoped_client
• 1a3f9651 - using base class' c'tor
• 2bffd0d3 - updated class description. thanks, @RainerKartmann
• 85ff0d8e - Merge branch 'feature/arviz_scoped_client' into 'master'
• e067cf90 - Merge remote-tracking branch 'origin/master' into feature/armem_robot_state_update

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added 1 commit

• f9f16c90 - fixing typo

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resolved all threads

added 3 commits

• a4d58fc7 - RobotNameHelper with additional functionality to load RobotInfoNode from xml file
• b492a8e8 - deleting files
• 8abf480f - ScopedClient: fixing virtual d'tor issue; need additional c'tor

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mentioned in commit 78db88ee

merged