Merge pull request #6 from kbroman/master

Fix bug in stepwiseqtlM
fixed refineqtlM.R
Merge Karl's changes
update stepwiseqtlF function to use additive.only=T
added error message when there is a phenotype with no variability
added stop when n=n.max and criteria doesn't meet
added option pheno.cols in calcpca function
pheno.cols option added in calcpca function
check na s in calcpca function
calcfunpca.R update
calcfunpca function update
bugfix
counting permutation number
Merge pull request #10 from kbroman/master

Fix bug in plotlod; need uchr[i] rather than i in several places
Merge pull request #11 from kbroman/master

fix typo in scanoneF
Merge branch 'master' of git://github.com/ikwak2/funqtl