Merge pull request #4 from nightscout/express-cache

Express cache
test alert1
alert test2
removed test alert
HTML App Cache: removed .css and .js files.

Caching these files this aggressively is trouble. :)
alert test1

now testing on azure
test 2

on azure
client.js change test successful

on both Azure and Heroku!
Merge pull request #5 from nightscout/express-cache

Express cache
README: Build & Dependancies

moved to watch the community branch.
Removing unused library
Removing unnecessary packages

nightscout.appcache is now a static file in /static
actually show bgdelta

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