Remove A2200 set_zoom() special case. A2200 set_zoom() bug was solved in CHDK trunk rev. 3488.
Remove test_a2200_set_zoom(a2200)
Merge branch 'master' of github.com:nafraf/spreads into nafraf-master

Conflicts:
	spreadsplug/dev/chdkcamera.py
Merge branch 'nafraf-master'