added security so that a user can only edit their own list. admin can
edit them all.
tidied up the generated html using the field plugin templates.
Merge branch 'master' of https://github.com/simonckenyon/dontforget.git

Conflicts:
	grails-app/controllers/ie/koala/dontforget/ReminderController.groovy
	grails-app/views/reminder/list.gsp