Production version clean-up.
Typos. Spelling.
Typos. Tracking qe-util.
Start of tutorial.
Typos.
Merge https://gist.github.com/603c0d13bc7d3dc8148d
Merge https://gist.github.com/5fb472070a272b61f75c
Merge https://gist.github.com/f3f37daa4cf1884f02ad
Merge https://gist.github.com/f7b46f20640f3e2e7634
Merge https://gist.github.com/99f18778525832746d48
Struct opt. added.
Merge branch 'master' of github.com:jochym/qe-doc