• Implemented platformio settings command
• Improved platformio init command.
  Added new option --project-dir where you can specify another path to
  directory where new project will be initialized (issue #31)
• Added Migration Manager which simplifies process with upgrading to a
  major release
• Added Telemetry Service which should help us make PlatformIO better
• Implemented PlatformIO AppState Manager which allow to have multiple
  .platformio states.
• Refactored Package Manager
• Download Manager: fixed SHA1 verification within Cygwin Environment
  (issue #26)
• Fixed bug with code builder and built-in Arduino libraries
  (issue #28)