added a1400 to list of devices
update setup.py to include A1400
chdkcamera should by default use wait=True
one possible resolution, but I now worry that a user can select a1400 but not have the usb matching code be run, causing a possible problem in the future
Merge branch 'a1400cameradevice' of https://github.com/matti-kariluoma/spreads into master