Fix memory corruption if using ROIs

The mock camera now only prints a buffer of roi size and
*then* transfers it to the caller.

Conflicts:
	plugins/mock/uca-mock-camera.c
Merge pull request #33 from miq/mock_fix

Fix memory corruption if using ROIs
Remove debug output
pco: Add fast-scan property
Silence g-ir-scanner tool
Fix annotations
Fix documentation warnings
Build xkit plugin
Fix some minor memory leaks
Fix one more leak
Use g_list_free_full instead of list_free_full