Main window: When the zoom level is changed, make sure the current page is redisplayed

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
setup.py: Added missing brackets (necessary for newer pythons versions)
Merge pull request #316 from Kernelhacker/testing

setup.py: Added missing brackets (necessary for newer pythons versions)
setup.py: Force the install of the latest version of Pyinsane and PyOCR

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Merge branch 'testing' of github.com:jflesch/paperwork into testing
Merge branch 'testing' into unstable