Easiest way to stitch GoPro videos that have been split due to length? I am recording 15-minutes videos with my GoPro Hero 3 Black edition. The camera starts a new file every 10 minutes of recording by default. I do not think I can change this in a setting.

When I do the white-balance and other edits in the GoPro Cineform Studio, I cannot find a function to stitch these videos back together into one continuous clip. 

I was somehow expecting that if GoPro automatically splits these videos that there would be a function to rejoin them, too. Am I missing something? Is there such a function in this software or do I have to get another software to do this? 

If so, what software should I get, assuming that I do not want to do anything else than that?
For this purpose I like to use SolveigMM Video Splitter. It's very fast and lossless video tool (no recompression) and it fully supports H.264 video (GoPro records in mp4 files using h.264 compression).