Merge pull request #1 from elafargue/master

Added scrolling output rather than cycling. Much more useful IMHO
Redesigned display

-Removed SVolt and BVolt
-Moved Current\Volt under graph
-Extend graph width of display
-Use clearDisplay to speed up redraws
-Reduce logo display time
-Enabled button to cycle display speed
-Millis based delay
Fixed URL
Add autoscale

Display is now able to autoscale. By default there are a few values
defined (0.2, 0.5, 1, 1.5 and 2 A) but you can adjust these by just
changing the array.

The drawing routine is now less efficient time-wise, since I now use
the previous values buffer with the read reading, and scale it to
24-0 at draw time. The reason for this, is that when scaling down,
this preserves the resolution of previous readings.

Please test!
Zip with fully working versions of libraries.

Extract to Arduino folder.
Merge pull request #3 from elafargue/autoscale

Add autoscale
Fixed mA alignment
Updated with auto scale version