calc BG based on time of treatment, if it's not set; draw outlines for empty carb/insulin hemispheres
added some validation and warnings when BG thresholds aren't stacked the expected way
adjust size of focus dots based on screen size
adjust the radius of the focus dots on transistion also (for rotate, etc)
added some text-shadow for carb/insulin amount to make them easier to read when overlaping other elements
move the context NOW line when scrolling
Merge pull request #1 from nightscout/wip/jingle-bells

Wip/jingle bells