Added Profilevis to the Vis tool and added various enhancements.
* Added options for the graph width and filtering on marker name to Samplevis and Profilevis. * The text fields in the HTML versions of Samplevs and Profilevis now update the graph OnChange instead of OnKeyUp. This is done because rendering the graph takes a while with large data files. * Fixed glitch in Profilevis that caused useless horizontal axis labels when the logarithmic scale is used. * Fixed glitch in Profilevis that caused Vega to render the graph even before data was loaded. * Changed -R option of SeqConvert to -r to avoid a potential collision with the -R/--report option if SeqConvert ever gets report output support in the future.