pcb-rnd 1.2.6 ~~~~~~~~~~~~~ The focus of the release is upgrading subcircuit support with terminals so that subcircuits can participate in circuits the same way as elements can. This made subcircuits suitable for use as footprints - without any of the inherited limitations of elements. Subcircuit terminals like SMD pads are often polygons and they need to clear copper polygons. This is done by introducing a new flag, CLEARPOLYPOLY that allows a polygon to have a clearance value and clear into other polygons just like lines and arcs. This can be used outside of subcircuits as well. On the way of completing the new layer code, the HID API for rendering layers and layer groups had to be rewritten to fully support multi-color, composite layer group rendering. This allows the user to have selection-color displayed on a composite layer group. It makes the rendering API much simpler and orthogonal - makes developer's life easier. All HIDs and export plugins are updated for the new API. To follow the best pcb-rnd traditions, a few new I/O plugins have been added for this release, helping better communication with 2d and 3d mechanical CAD applications: - openscad exporter rewritten from scratch - a new dxf exporter, written from scratch - a minimalistic importer for HPGL