Splitting off NonPR2 Functionality

[DLu]

#20 reminded me that there are portions of this "stack" that are not PR2 specific and should likely be spun off into their own non-PR2 based package.

[UltronDestroyer]

Namely what portions? I'm willing to work with separating this out if you take the lead on it.

[DLu]

Arguably, the three parts with actual code:

• laser_tilt_controller_filter
• pr2_navigation_self_filter
• semantic_point_annotator

However, I'm not sure if anyone is using any of this code for non-PR2 applications, other than the self_filter.

[UltronDestroyer]

Continuing on from #20

@garaemon could you please make a PR to https://github.com/PR2/robot_self_filter?

[garaemon]

I created a PR PR2/robot_self_filter#1