R/qtlbim package (http://www.ssg.uab.edu/qtlbim)
1.04-x	Internal version; conversion from R/bim to R/qtlbim
1.05-x	Beta release.
1.6.0	Fix C code for Mac OSX; improved chromosome name handling.
1.6.1	Fix examples; improved covariate graphics.
1.6.2	Fix generic method use in example pages;
	fix chromosome name handling.
1.6.3	Shorten examples; fix degrees of freedom and LPD in scan;
	upgrade to R/qtl 1.04.
1.6.4	Minor logic errors; check output.dir exists.
