add kukaCamGymEnv.py with camera observations (preliminary)

show camera position in example browser
disable per-vertex and per-fragment profile timings

examples/pybullet/gym/envs/bullet/__init__.py

@@ -4,3 +4,4 @@ from envs.bullet.racecarGymEnv import RacecarGymEnv
 from envs.bullet.racecarZEDGymEnv import RacecarZEDGymEnv
 from envs.bullet.humanoidGymEnv import HumanoidGymEnv
 from envs.bullet.kukaGymEnv import KukaGymEnv
+from envs.bullet.kukaCamGymEnv import KukaCamGymEnv