fixed bug in sorting non-numerical values
Sorting of time-period by notation (for months)
Long labels for time-period title in scatter and bubble
default value for plotlines when no data
added HR in sample configurations
N/A label and tooltip when point value missing
added series.name in tooltip for N/A values
Added NO and IS in sample configurations
redo 58836d32ee2f44807, tests were failing
fixed newline in tooltip for N/A values
readme: basic info about the project.
added NO and IS as default in scatter chart