Fix spelling of "April"
Add info on spacing between knockout rounds

Since score entry takes time, it is wise to build-in delay between the
rounds of the knockouts.  This adds 5 minutes between each round.  It
also adds an extra 5 minutes on top of that before the final match
(allowing both rotation and suspense building to occur).
Specify timezone on dates

As per commit d0a253351dc89d7e8ecae9ac147be4cd5f69d05a of srcomp this
ensures that all internal dates are stored as UTC.
Change how empty corners are represented.

Using 'null' matches what's in the real compstate.

Change-Id: I1733650dde38f9c23d4184c27f62be75d803193e