add humanoid and kuka gym environments (experimental)

examples/pybullet/gym/kukaGymEnvTest.py

@@ -0,0 +1,21 @@
+
+from envs.bullet.kukaGymEnv import KukaGymEnv
+print ("hello")
+environment = KukaGymEnv(renders=True)
+
+  
+motorsIds=[]
+for i in range (len(environment._kuka.motorNames)):
+  motor = environment._kuka.motorNames[i]
+  motorJointIndex = environment._kuka.motorIndices[i]
+  motorsIds.append(environment._p.addUserDebugParameter(motor,-3,3,environment._kuka.jointPositions[i]))
+
+while (True):
+    
+  action=[]
+  for motorId in motorsIds:
+    action.append(environment._p.readUserDebugParameter(motorId))
+  
+  state, reward, done, info = environment.step(action)
+  obs = environment.getExtendedObservation()
+