Version 0.4

• Use chdkptp utility for controlling cameras with CHDK firmware
• Fix instability when shooting with CHDK cameras
• Shoot images in RAW/DNG file format (experimental)
• Remove download step, images will be directly streamed to the project
  directory
• Remove combine plugin, images will be combined in capture step
• Device driver and plugins, as well as their order of execution can be set
  interactively via the configure subcommand, which has to be run before
  the first usage.
• Lots of internal API changes