Update README.md

Remove 'HEAD' text introduced by aa81c3c7e606474dc615519bab0ab2a73859d0b3
fix a couple things that cropped up during merging
Merge pull request #264 from jspiewak/merge-cleanup

fix a couple things that cropped up during merging
Merge pull request #263 from obazoud/patch-1

Update README.md