Drawj2d 1.0.0 released

This release adds the output type drawing exchange format (dxf) .

Changes:
- new output file type dxf (drawing exchange format)
- fall-back modes for pdf (orsonpdf) and svg (jfreesvg)
- licence update to GPL3+
- library updates: evalex, jlatexmath, svgsalamander, pdfrenderer