Drawj2d 0.5.0 released

This release implements support for TeX formatted labels and adds geometry commands.

Changes:
- new command texlabel. Based on JLaTeXMath, no latex installation required.
- new commands polygon and fillpolygon
- command line enhanced to accept more than two points
- new geometry commands: geom.intersect, geom.intersectlinepath, geom.area, geom.centroid, geom.vector, geom.crossproduct, geom.dotproduct, geom.anglerad, geom.angle, geom.length, geom.norm
- input encoding UTF-8 independent of platform
- fallback mode vectorgraphics2d removed