add usuage stuff
Merge branch 'master' of github.com:natebrennand/twiliogo
Merge branch 'master' into usuage

Conflicts:
	NOTES.md
Merge pull request #44 from natebrennand/usuage

Usage trigger
Merge branch 'master' of https://github.com/natebrennand/twilio-go into voice
deleting code graveyard