* added File->Reload (CTRL-L), this saves a lot of klicking and
    scrolling through the file dialogue while adjusting the design.
  * added View->Identify to print the device seen to stdout.
    Refactored UsbOpen() / UsbInit() from Plotter.cpp:Cut().
  * added to about message and tooltip. Removed debug page dump on stdout;
  * robocut.spec added, as used in https://build.opensuse.org/package/show?package=robocut&project=home:jnweiger
  * added Transform_Silhouette_Cameo() to rotate the plot as SVG onscreen.
    Allow left aligned paper. Cameo has high x-coordinates to the left,
    although the head homes at the left side.
improved error message, when nothing loaded
Merge pull request #1 from jnweiger/master

Coordinate transformation for silhouette cameo, and some minor refactoring.