Merge pull request #537 from 2600hz/pivot_kazoocon

Pivot kazoocon
KAZOO-2788: handle the master account during installation
pivot_kazoocon: tts callflow schema
pivot_kazoocon: move schema to dir
pivot_kazoocon: remove old schema file
pivot_kazoocon: add generic collect_dtmf callflow
pivot_kazoocon: set dtmfs on successful collection
pivot_kazoocon: schema for collect_dtmf callflow action
pivot_kazoocon: add missing brace for blacklists
pivot_kazoocon: require unique list of terminators
pivot_kazoocon: remove trailing commas
pivot_kazoocon: remove last trailing comma