2.4.6

Added

• Subcommands to 'bmcs compute image import / export' to allow specifying
  source / destination in multiple formats.
• Secondary IP operations ('bmcs network private-ip', 'bmcs network vnic
  assign/unassign-private-ip').
• '-h' alias for global '--help' option (#6)

Fixed

• 'bmcs os object put' accepts input from stdin (#7)
• 'bmcs compute image export' successfully exports image (#4)

Changed

• Upgraded cryptography dependency to 1.8.2 (#5)
• Deprecated --image-source-details param of 'bmcs compute image create' in
  favor of subcommands (see Added section).