Fixes Add depth map and camera_info topics to the pmd_nano driver (sr-grasp-stabilisation #166)

```
---
header: 
  seq: 2920
  stamp: 
    secs: 1399900333
    nsecs: 882866989
  frame_id: ''
height: 120
width: 165
distortion_model: plumb_bob
D: [-0.222609, 0.063022, 0.002865, -0.001446, 0.0]
K: [104.119, 0.0, 81.9494, 0.0, 103.588, 59.4392, 0.0, 0.0, 1.0]
R: [1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0]
P: [104.119, 0.0, 81.9494, 0.0, 0.0, 103.588, 59.4392, 0.0, 0.0, 0.0, 1.0, 0.0]
binning_x: 0
binning_y: 0
roi: 
  x_offset: 0
  y_offset: 0
  height: 0
  width: 0
  do_rectify: False
---
```