Added DummyUnit and DummyObserver as simple examples for the documentation

scenarios/DummyTest/CMakeLists.txt

scenarios/DummyTest/config/DummyUnitApp.cfg

scenarios/DummyTest/config/DummyUnitObserver.cfg

source/RobotAPI/applications/CMakeLists.txt

...ce/RobotAPI/applications/DummyUnitObserver/CMakeLists.txt

...API/applications/DummyUnitObserver/DummyUnitObserverApp.h

source/RobotAPI/applications/DummyUnitObserver/main.cpp

source/RobotAPI/interface/CMakeLists.txt

...botAPI/interface/observers/DummyUnitObserverInterface.ice

source/RobotAPI/interface/units/DummyUnitInterface.ice

source/RobotAPI/units/CMakeLists.txt

source/RobotAPI/units/DummyUnit.cpp

source/RobotAPI/units/DummyUnit.h

source/RobotAPI/units/DummyUnitObserver.cpp

source/RobotAPI/units/DummyUnitObserver.h