[ROS_Client][wip] Add point head method (dependent on PR2 PointHead action).

[130s]

Do NOT merge yet.

Hinted at http://wiki.ros.org/pr2_controllers/Tutorials/Moving%20the%20Head

• Action server not returns. Head does not move as a result.
• Add tests.

[130s]

Added hironx_head_action pkg, similar as pr2_head_action pkg. Now action server seems to be trying to do the work but still yields error:

[ERROR] [1454350266.914027519, 221.234999999]: Service call to query controller trajectory failed.

while sending commands like this:

$ ipython -i `rospack find hironx_ros_bridge`/scripts/hironx.py
:
In [13]: ros.look_at('WAIST', 8.2, 0.1, 0.01)
[INFO] [WallTime: 1454350253.282177] [207.510000] goal sent via aclient_point_head
[INFO] [WallTime: 1454350253.282725] [207.510000] done aclient_point_head

In [14]: ros.look_at('WAIST', 8.2, 0.1, 1.01)
[INFO] [WallTime: 1454350263.056392] [217.370000] goal sent via aclient_point_head
[INFO] [WallTime: 1454350263.056962] [217.370000] done aclient_point_head

In [15]: ros.look_at('WAIST', 1.2, 0.1, 1.01)
[INFO] [WallTime: 1454350266.912696] [221.235000] goal sent via aclient_point_head
[INFO] [WallTime: 1454350266.913651] [221.235000] done aclient_point_head

This error is returned from the action server I'm adding:
https://github.com/start-jsk/rtmros_hironx/pull/427/files#diff-e4974846b35b9f6fa59a02a56c7775e2R291

+    if (!cli_query_traj_.call(traj_state))
+    {
+      ROS_ERROR("Service call to query controller trajectory failed.");
+      gh.setRejected();
+      return;
+    }

[k-okada]

rewrited ad #468