Merge branch 'master' into quoc
Merge pull request #2 from kbroman/master

Think I have X covariates business fixed
Add stepwiseqtlX.R file to the project
Add stepwiseqtlQuoc.R

This is the clean version of stepwiseqtlX with more comments and 1 obsolete function deleted. We can take stepwiseqtlX out of the repo and only work on this file for the code merge. 
4 main functions: countqtltermsQuoc, calcQuoc.penalties, stepwiseqtlQuocv12514, calc.plodQuoc.
Merge branch 'master' of git://github.com/QuocTran/qtl into quoc
Merge branch 'master' into quoc
Remove R/stepwiseqtlX.R
Update version; add Quoc to DESCRIPTION
Rename stepwiseqtlQuoc.R as stepwiseqtlX.R
Rename the stepwiseqtl-related functions for A vs X, using "X" rather than "Quoc"
Remove trailing whitespace
Revise stepwiseqtlX to handle the less-than-full-rank business
Fix the "fix me" bugs in stepwiseqtlX.R
Remove QTLX.Rproj and put in .gitignore
Code cleaning of mqmdatatypes.cpp
Code cleaning of mqmeliminate.cpp
Code cleaning of mqmregression.cpp
Merge branch 'master' of github.com:kbroman/qtl
Merge branch 'master' of github.com:kbroman/qtl
Merge with kbroman/qtl master