Add method to get global robot pose to RobotStateMemory

Tested it with Python; it works and throws a useful exception if invalid robot name is given ;-)

data/RobotAPI/VariantInfo-RobotAPI.xml

@@ -344,5 +344,13 @@
             propertyName="MemoryNameSystemName"
             propertyIsOptional="true"
             propertyDefaultValue="MemoryNameSystem" />
+        <Proxy include="RobotAPI/interface/core/RobotLocalization.h"
+            humanName="GlobalRobotPoseProvider"
+            typeName="armarx::GlobalRobotPoseProviderPrx"
+            memberName="GlobalRobotPoseProvider"
+            getterName="getGlobalRobotPoseProvider"
+            propertyName="GlobalRobotPoseProviderName"
+            propertyIsOptional="true"
+            propertyDefaultValue="GlobalRobotPoseProvider" />
     </Lib>
 </VariantInfo>