fix links and other sphinx warnings
Merge branch 'master' of https://github.com/plone/documentation

Conflicts:
	index.rst
	license.rst
	manage/deploying/preparing.rst
	manage/installing/installation.rst
collection old/new split
Merge branch 'master' of https://github.com/plone/documentation

Conflicts:
	manage/troubleshooting/exceptions.rst
Merge branch 'master' of https://github.com/plone/documentation

Conflicts:
	manage/index.rst
Merge branch 'master' of https://github.com/plone/documentation