PNH charts use _configure_date_axis(), adjusted for default format override; remove unnecessary hh:nn from StartOfDayFilter - never need that accuracy; PNH chart checks again for plottable data in case regex failure (may generate empty chart)
* stash pnh params in controller so role method doesn't rely on duplicating same order * simplfied regex capture using stashed params * provisionally disable erythroctes & reticuloctes in chart
moved path to ChartDirector from /home/raj/perl5/lib/perl5/ChartDirector to /home/raj/perl-lib/ChartDirector/lib where ~/perl-lib/ChartDirector is symlink to CD v6.0; enabled trend_analysis graphs
moved HIV chart looks_like_number() check to own sub-routine check_numeric() for eventual sharing with other chart methods; moved HIV \@chart_data to class method chart_data() for access from new check_numeric() method
