Only evaluate r### format samtools version numbers.  Newer versions contain Idxstats sub-command.
Die when version number is too old.  Update the regex.
RDP: add versions 2.9 and 2.10 plus training set 10
Updated class browser cache.
Updated `genome` tab completion.
Updated `gmt` tab completion.
Merge pull request #164 from jasonwalker80/samtools_idxstats_version
Merge pull request #181 from ebelter/rdp

RDP: add versions 2.9 and 2.10 plus training set 10