Add support for missing CameraInfo.msg fields

[UniBwTAS]

Missing (and added) fields are: binning_x binning_y roi.x_offset roi.y_offset roi.height roi.width roi.do_rectify

We (and I think also other developers) need to be able to set a certain ROI in our camera driver. So we added support for these fields in the YAML parser. It is fully backwards compatible, with old config files.

[UniBwTAS]

@mjcarroll Do you have any thoughts on this pull request?

[UniBwTAS]

@ahcorde Can you review this pull request?

[gbiggs]

The additions look OK to me, but I'm going to get a second opinion just in case.

Have you got a test that has the existing fields but not your new ones, to verify that existing configuration files will work without errors?

[clalancette]

I didn't do a detailed review, but it does look like this is backwards compatible. So I'd say this is generally OK.

[clalancette]

I didn't do a detailed review, but it does look like this is backwards compatible. So I'd say this is generally OK.