Make comments editable
provide "delete own comments" as a configurable option
Merge branch 'master' into edit-comments-squashed

Conflicts:
	CHANGES.rst
rebased branch from master
fixed edit test
added Delete comments permission to manage comments deletion
fixed upgrade step
fixed HISTORY and add delete test to test_comments_viewlet
rebased CHANGES and tests
Make comments editable
provide "delete own comments" as a configurable option
rebased branch from master
fixed edit test
added Delete comments permission to manage comments deletion
fixed upgrade step
fixed HISTORY and add delete test to test_comments_viewlet
rebased CHANGES and tests
fixed CHANGES
Merge pull request #50 from cekk/edit-delete-final

Edit and delete comments