improve heatmap coloring
improve summary stats and key display
improve processing and display of zero counts
remove opera from test runner
filter values before setting domain
add min/max summary stats
add summary for avgs
add daysWithObservations to summary
optimize processing of avgs
add avg to dayOfWeekSummary
cleanup
cleanup checkData
Merge branch 'zeroError'
wrap text with parentheses
update reports build
update d3.js and remove temp fix for color domain