v0.20.0

Changelog

425ead2 release version 0.20.0
b8ef5d1 read v2 files (#235)
7b86bec [breaking] port plan to use config v2 (#234)
d4fa76a Updated README license to 2019 (#232)
91c7285 config conversion v1 -> v2 (#231)
3333412 config v2 (#230)
1dbfb72 config -> config/v1 (#229)
52bbfbc [breaking] consolidate debug and verbose modes (#227)
bb2471d [breaking] require account_id be set in defaults (#224)
2ab8afa remove env output (#222)