Add link to HEAD docs, fix contributor typo.
Add link to HEAD docs, fix contributor typo.

phanib4u/streamparse,eric7j/streamparse,crohling/streamparse,Parsely/streamparse,hodgesds/streamparse,hodgesds/streamparse,codywilbourn/streamparse,crohling/streamparse,eric7j/streamparse,Parsely/streamparse,phanib4u/streamparse,codywilbourn/streamparse