Added alarm silence for 120 minutes
tweak whitespace
fix now-line placement

Fix now-line placement to be sensitive to when panning is or isn't
being used.

This allows fixes a problem where the now-line was off by ten minutes.
manually bust cache

A number of people using recent sources experimenting with
caches will need to bust the cache at least once.  While we have
correct caching implemented now, the previous caching
implementation requires one busting in order to clear things
through.
Merge pull request #5 from nightscout/express-cache

Express cache