Fix up display stuff a bit, include a blinky period
Bump up debugging serial rate to 115200
Use floating point division to compute temperatures

stupid integers
Ditch the dot toggle.  Instead, update less often

With the new floating point division thing, the screen was much too
jumpy.  This smooths it out.
simplify recordkeeping math
Merge branch 'display_adjustments' into issue_6

Conflicts:
	lcd_temperature_display.ino