New version. Exclude PDL::Lite, add PDL to prereqs
Remove dependencies on external R libraries.

Remove all calls to external R libraries like "plotrix" and "RColorBrewer".
Such calls existed in plot apps and there were cases where they were actually
used and cases where they were redundant.
Fix compare_counts to use normalized value to Plot

compare_counts was falsely calling the plotting function without providing the
normalized column name (*_uq). Instead it was using the unnormalized column.
Fix data download link in tutorial.

Change it from mourelatos02 to mourelatos03.
Bump version number to 0.1.1