Added ObserverPropertiesGuiPlugin to ArmarXGui

CMakeLists.txt

plugins/CMakeLists.txt

plugins/ObserverPropertiesPlugin/CMakeLists.txt

plugins/ObserverPropertiesPlugin/ObserverGuiPlugin.cpp

plugins/ObserverPropertiesPlugin/ObserverGuiPlugin.h

plugins/ObserverPropertiesPlugin/ObserverItemModel.cpp

plugins/ObserverPropertiesPlugin/ObserverItemModel.h

plugins/ObserverPropertiesPlugin/ObserverProperties.ui

plugins/ObserverPropertiesPlugin/widgets/DataFieldWidget.cpp

plugins/ObserverPropertiesPlugin/widgets/DataFieldWidget.h

plugins/ObserverPropertiesPlugin/widgets/ObserverWidget.cpp

plugins/ObserverPropertiesPlugin/widgets/ObserverWidget.h

plugins/ObserverPropertiesPlugin/widgets/VariantWidget.cpp

plugins/ObserverPropertiesPlugin/widgets/VariantWidget.h

...tiesPlugin/widgets/properties/ChannelPropertiesWidget.cpp

...ertiesPlugin/widgets/properties/ChannelPropertiesWidget.h

...esPlugin/widgets/properties/ConditionPropertiesWidget.cpp

...tiesPlugin/widgets/properties/ConditionPropertiesWidget.h

...esPlugin/widgets/properties/DataFieldPropertiesWidget.cpp

...tiesPlugin/widgets/properties/DataFieldPropertiesWidget.h