Added capital letter for limit
Made limit fields required
Updated changes
Merge branch 'master' of github.com:plone/plone.app.collection into fix-limit

Conflicts:
	CHANGES.txt
	plone/app/collection/interfaces.py
Limit and item count can now be missing, the default values from the querybuilder will be used.
Merge pull request #16 from headnet/fix-limit

Made limit required