Do not reset symbol to string

cf. http://blog.binarybalance.com.au/2012/02/19/ruby-method-missing-and-%27no-id-given%27

Resetting the method_name param from symbol to string
causes an ArgumentError "no id given" if the method missing
calls get to the BasicObject class in Ruby 1.9.3 which hides the
actual problem.
Add links to person page #3880

Allowing user to navigate back to the
person/participant page

Done with #3880
Limit continuable action #3880

Do not show the continue action if the event is
an informed consent event that is associated with
other events.

Also do not show the continue action if the event
is closed (non consent events)

This is a temporary fix for #3880 - the permanent fix
should be a different solution but done at a later date.
Merge branch 'develop' into 3880_contacts_on_wrong_events

Conflicts:
	app/models/event.rb