3D printer host core commands

 Printrun is a full suite of host interfaces for 3D printers and CNC,
 consisting of:
  * printcore, a standalone non-interactive G-Code sender
  * pronsole, an interactive command-line host
  * pronterface, a graphical host software with the same functionality as
    pronsole
 .
 Together with Slic3r they form a powerful 3d printing toolchain.
 .
 This package contains printcore, the G-Code sender.