CHANGES IN VERSION 3.5
----------------------

USER VISIBLE CHANGES

    o The function snp.score has been added. The functions snp.scan.logistic, recode.geno, score.test have been removed.
    o The function chromosome.plot has been renamed to Manhattan.plot

BUG FIXES

    o The function snp.logistic checks that the snp variable is used in main.vars or int.vars.

PLANS

    o Efficiency improvements.

