Rationalisation of param handling for paged and unpaged lists
Fleshing out of the activity stream (ripped off from Github). Still v. rough.
Merge changes to list/page params and portal activity stream.

Conflicts:
	modules/core/app/controllers/base/EntityRead.scala
	modules/core/app/rest/EntityDAO.scala
	modules/portal/app/controllers/Portal.scala
	test/DAOSpec.scala