Add comment and slightly tweak title
Improve log axes and show message when no data to plot

Make plugin for flot to generator logarithmic axes
Fix possible -999/-1 bin for histograms if it is the first value
Filter invalid values for logarithmic axes
Filter data before passing to histogram
Split filters into separate functions
Remove -999/-1 filter from jsparc.histogram
Add test data file with columns that have specific types of values
Fix data filters, they could skip consecutive error values (add `i--`
after splice)
Update included datasets

Events datasets now include data in the t_trigger column