Added functionality to plot multiple samples at once.
Added PlotSegments.t and fixed undefined plot title issue.
Merge branch 'master' of ssh://git/srv/git/genome
Fixed overlapping ticks in multiple plots.
Support percentage plot
Add percentage plot tool
Merge branch 'master' of ssh://git/srv/git/genome
Fixed threshold value types from Int to Float. Added hint regarding window size
Merge branch 'master' of ssh://git/srv/git/genome
Try to detect filesystem problems with FileMux-type datasources

These data sources now require that the directory containing the data files
must exist and be readable.  This should catch cases where there's a broken
symlink, archived allocation or NFS problem.
Updated class browser cache.
Updated `genome` tab completion.
Updated `gmt` tab completion.
Merge remote-tracking branch upstream/$:{upbranch}