Merge pull request #1 from nightscout/master

pr
Merge pull request #4 from nightscout/master

pull
Merge pull request #5 from nightscout/master

update
Merge pull request #9 from jimsiff/wip/bgDelta

Wip/bg delta
update css
Update index.html
update client.js

format delta for mmol
add "mmol" and "mg/dL"
Merge pull request #2 from ELUTE/wip/bgDel

Delta below BG, better MMOL support