Left panel background is now visible in pub demo

& filter header is now aligned and includes “item count” text on by
default
showNoneCat config option: "None" category is auto-added

Default categoryTextWidth : 153 pixels (minimum)
Left panel top row is better structured in html.
None cat. listed for coauth, coauth type skips Bederson
All boolen options merged in a single facet with AND.
You can specify another integer value for bars

The value will be summed up for bar chart display. No other ggregation
method is supported currently.
You can specify default bar chart width using barChartWidth config
option.
Non-clickable rows are grayed out (rather than unselected columns)
categoryTextWidth config option only sets category width from now on
(does not incude the numeric value)
Data source & info shown on chart title column
Default categoryTextWidth updated to 107

All demos are updated accordingly.
New US presidents demo + Simple demo updates
Category hover highlights items + Transitions for color updates
New "config" approach: Filtering method can now be updated
Minor demo updates