Potentially last release before 1.0 :)

v0.9.0 (2015-05-17)

Improvements

• usage usage strings now include parent command requirements (dd8f21c7, closes #125)
• args allows consumer of clap to decide if empty values are allowed or not (ab4ec609, closes #122)

Features

• subcommands
  • allows optionally specifying that no subcommand is an error (7554f238, closes #126)
  • subcommands can optionally negate parent requirements (4a4229f5, closes #123)