Support several galleries at the same time.
Merge pull request #53 from collective/multi_galleries

Support several galleries at the same time.
we are not allowing more failures on Plone 4.3 CI now that is fixed
include i18ndude on the development configuration
move development to Plone 4.3 branch
add ZPT validation on CI
use basic-validation bundle
deal with images in summary_view
allow failures on Plone 4.3 until new branch mixed
Merge branch 'master' into plone43

Conflicts:
	.travis.yml