add photo capture feature

[kochigami]

Following [WIP] add subscribers/speech.cpp #43, I added to photo capture feature. I checked this with Pepper who has NAOqi 2.3 version, PC which has ROS indigo. It requires prevent calling ros::init without name; use node_name command option instead of namespace #44 and [pepper_bringup/launch/pepper_full.launch] use node_name argument instead of namespace # 11.

If there is any problem, please let me know.

[Karsten1987]

I am not sure if this PR really fits into the core scheduler of naoqi_driver. Wouldn't this better fit in any kind of naoqi_apps folder and can be started separately?

Because this means that every robot depends on the Photofeature app and is not necessarily essential for launching a robot.

Other from this, can you maybe add a parameter for the hard coded path for storing the image?

[vrabaud]

@suryaambrose , we need to have this second process that handles non-sensor services.

[vrabaud]

Also, @kochigami , please rebase

[kochigami]

Sorry for leaving it for a long time.
I'll make ALPhotoCapture features in naoqi_apps in the future.