Ran through jshint.

Cleaned up some whitespace issues;
Added 'use strict' in a few places;
Changed '==' to '===' in a few places;
Found one missing semicolon at the end of a statement;
Moved more styling from index.html to external css.
Shifted page elements right. Fixed off by one error on crosshairs.

Added x-axis label to time series plot.
Add styling for checkbox grid.
Removed obsolete drawAxis() from Display.  Added comments.