Merge pull request #64 from bbarker/master

very minor changes to support NANs for missing gene data.
Updating: tidying up some code
Updating: merge
Updating: fixing a typo
Merge pull request #65 from bbarker/master

a few minor changes to conform to original minDisj.exe functionality
Updating: minorly improving ATSLIB
Updating: merge
Updating: minorly improving ATSLIB documentation
Updating: improving ATSLIB documentation
Updating: miscellaneous
Updating: removing print_val and prerr_val
Updating: fixing errmsg reporting
Updating: add Algorianim/insertsort
Updating: minorly improving
Updating: license change: LGPL -> BSD; adding libats/ML/matrix0
Updating: generally improving
Updating: improving libats/ML/matrix0
Updating: minorly improving prelude/matrixref and libats/ML/matrix0
Updating: minorly improving
Updating: renaming some files