add humanoid and kuka gym environments (experimental)

examples/pybullet/gym/humanoidGymEnvTest.py

@@ -0,0 +1,21 @@
+
+from envs.bullet.humanoidGymEnv import HumanoidGymEnv
+print ("hello")
+environment = HumanoidGymEnv(renders=True)
+
+environment._p.setGravity(0,0,0)
+	
+motorsIds=[]
+for motor in environment._humanoid.motor_names:
+	motorsIds.append(environment._p.addUserDebugParameter(motor,-1,1,0))
+
+while (True):
+    
+  action=[]
+  for motorId in motorsIds:
+  	action.append(environment._p.readUserDebugParameter(motorId))
+  
+  state, reward, done, info = environment.step(action)
+  obs = environment.getExtendedObservation()
+  print("obs")
+  print(obs)