* include/gphoto2-camera.h:
* libgphoto2/camera.c: Add gp_camera_[set,get]_model. Please use
those functions instead of directly accessing camera->model.
* libgphoto2/core.c: On exit, set glob_abilities_list = NULL
* tests/test-gphoto2.c: Add lots of documentation.
git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@2081 67ed7778-7388-44ab-90cf-0a291f65f57c