Changed color of TH text
Changed color of TH text

The white on light gray was not very readable.  Switched to
the default text color.

Fixes #239

City-of-Bloomington/civic-legislation,City-of-Bloomington/civic-legislation,City-of-Bloomington/civic-legislation,City-of-Bloomington/civic-legislation,City-of-Bloomington/civic-legislation