added data feeder API

[mbuerki]

No description provided.

[mbuerki]

code as I use it right now.

if you are interested in adapting this, I can make some changes, remove some non-generic aspects (i.e. I load four images in the data feeder thread because I know I have four cameras, stuff like that)

[ahundt]

What does this do? I just made a lot of changes to improve cross platform support and I'm going to submit another pull request.

[hengli]

Sorry that I have not addressed this for so long. The pull request by mbuerki makes it easier for users to use the CamOdoCal library; after placing the text files with odometry/GPS data and image files in the specified directory, they simply call an executable which automatically reads the data, runs the calibration, and generates calibration data. If you are interested in working on making the proposed changes more changes, do feel welcome to do so.

[ahundt]

Hey @mbuerki, thanks to @hengli I'm a library maintainer now. If you were still interested in merging the changes with the fixes to the non-generic aspects of your pull request I'd be happy to help.