added interpretation of anova table when only there is a single qtl source of variation, and some code refactoring..
added interpretation of anova table when only there is a single qtl source of variation, and some code refactoring..

solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn