Merge retrospective-prediction

Thanks to advice by Adrien de Croy I added/updated the following sample
headers.

cache-control: public, max-age=2592000
expires: Thu Jul 24 2014 17:16:14 GMT-0700 (PDT)
Arr-Disable-Session-Affinity: True

Upgraded from node-static to Express, and now the site caches like a
champ!

Upgraded from node-static to express.

and now the site caches like a
champ!

Tested by deleting everything, running npm install from scratch.
This helps ensure that only the files in the static subdirectory can be served.
Should eliminate serving config files via http.

move static files into /static

and other dynamic elements.

This isn’t used at the current time.

Added “dateformat” package. Plus some code reorganization.

Added “dateformat” package. Plus some code reorganization.

Added “dateformat” package. Plus some code reorganization.

Added “dateformat” package. Plus some code reorganization.

Adding socket.io.js to nightscout.appcache, plus a little cleanup.

to only include audio, favicon, and google fonts. HTTP Header Cache
caches all.

to only include audio, favicon, and google fonts. HTTP Header Cache
still caches all.

so we can utilize SSL without breaking the appearance of the site.

Tested using curl, sending the if-modified-since header, and monitored
using chrome.

Reloads sources when they have changed, otherwise allows using cached
version.

When adding retrospective, the brushing extent should factor in the 30
minute offset when displaying "now".

This allows the browser to cache things better.
Re-uses same media object across alarms.

Express cache

Caching these files this aggressively is trouble. :)

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.

now testing on azure

on azure

on both Azure and Heroku!

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.

Express cache

moved to watch the community branch.

nightscout.appcache is now a static file in /static

The first bgdelta was always 0, which is incorrect.
This allows the first item to have a delta.

bgdelta also

… it was unnecessary.