* adds new options to Params: "TRIM after" and "STOP after"
* adds tooltip support to Params
* inkstitch now includes libembroidery and can directly output any supported file type
* this avoids the need for `libembroidery-convert` and compiling embroidermodder!
* TRIM support for DST format (inserts 3 JUMPs)
* STOP command supported as an extra color change that the operator can assign to code C00
* TRIMs cause the following jump stitch not to be displayed in the Embroidery layer
The simulation window is scaled to fill the available space on the screen. In
the Params dialog, the simulation window sits to the right of the Params window
and fills the remaining space.
The problem with this approach is that sometimes the SystemExit happens down
inside shapely and it complains bitterly (on stderr). May have to rethink.