Changes

tsk27 Adds API method to list Events sorted by date
REST resource for Events has been created, with a method (GET to event's 
resource root) to list events sorted by date in the same way as the
index page does. Some changes have also been done to make it work as
expected.
Correct testing of this list method requires changes in events datasets
to validate that date ordering is preserved. It is a pending issue that
will be addressed in following commits.