update buildout to use latest Plone
prepare buildout for Plone 5
ported to plone.app.testing (batch 1)
Fix some tests.
Whitespaces cleanup
remove test already present in plone.app.imaging
ported tests to plone.app.testing
removed test_suite entries. Tests are picked up by the runner anyway
removed unused import reported by frosted
Merge branch 'master' into tomgross-ptc

Conflicts:
	buildout.cfg
fixed doctests of README.txt
ported all doctests to p.a.testing (with still some failures)
fixed webdav tests
fixed some more tests using p.a.testing
use different name for webdav/scaling image to not interfere with other
tests
Merge remote-tracking branch 'origin/master' into tomgross-ptc
correctly setup and teardown blob content in test_integration
cleanup content to not interfere with other tests
run pep8ify
Merge branch 'master' into tomgross-ptc

Conflicts:
	src/plone/app/blob/field.py
	src/plone/app/blob/interfaces.py