Properly set ENV var for Mac osx
Update README.md
Bump to 0.3.1
Switch to non-GitHub link
Set up subdirectories for Lasem and itexToMML
Move itexToMML and Lasem to subfolders
Don't worry about dirty Lasem submodule
Copy over nested Lasem files, and then delete them post-compile
Update *ext* README
Merge pull request #25 from gjtorikian/update-lasem

Update Lasem
Merge branch 'master' into a-few-secure-bolts