Pick a reviewer more intelligently

Closes #2
Always suggest a reviewer if the author doesn't

Closes #3
spell erickt right
Fix some mispelt usernames
Merge pull request #18 from huonw/patch-1

Fix some mispelt usernames
Merge branch 'master' of github.com:nick29581/highfive into HEAD

Conflicts:
	newpr.py
	reviewers.json
Only post the review message if highfive did pick it
WIP