create premake/cmake file for Bullet/Extras/obj2sdf

add missing 1.sdf for Bullet/data/kitchens/1.sdf
add support for getting keyboard events (pybullet.getKeyboardEvents and b3RobotSimulatorClientAPI::getKeyboardEvents)

examples/RobotSimulator/b3RobotSimulatorClientAPI.h

@@ -167,6 +167,8 @@ public:
 
 	void stepSimulation();
 
+	bool canSubmitCommand() const;
+	
 	void setRealTimeSimulation(bool enableRealTimeSimulation);
 
 	void setGravity(const b3Vector3& gravityAcceleration);
@@ -186,6 +188,9 @@ public:
 	int startStateLogging(b3StateLoggingType loggingType, const std::string& fileName, const b3AlignedObjectArray<int>& objectUniqueIds);
 	void stopStateLogging(int stateLoggerUniqueId);
 
+	void getVREvents(b3VREventsData* vrEventsData);
+	void getKeyboardEvents(b3KeyboardEventsData* keyboardEventsData);
+
 };
 
 #endif //B3_ROBOT_SIMULATOR_CLIENT_API_H