v3.1.0-rc.1

Bug Fixes

• exit with nonzero rc on invalid command (c7a99f9)
• fix #27: Daemon will start synchronisation from block undefined (1b3d6f7)
• fix #28, do not display posting key in debug (c426395)

Features

• add basic cli tests (c83cf0b)
• add context to App (c929f14)