Full Caching with Express,

Upgraded from node-static to express.
Upgraded from node-static to Express,

and now the site caches like a
champ!
put everything in a static directory

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.
Merge pull request #3 from nightscout/express-cache

move static files into /static
Disable caching for /pebble

and other dynamic elements.
Merge pull request #3 from brianhanifin/express-cache

Express cache