release v0.12

bugfix release 0.11.2

update blocks tutorial

improve exploding for non uniform scaled blocks

ARC and ELLIPSE are handled correct as far as I have tested, maybe there are still some issues with the start- and end parameter adjustment.

release 0.11.1

last fixes

release v0.11

fix HATCH pattern scaling

height group code (40) for TEXT, ATTRIB and ATTDEF is mandatory

v0.11 is feature complete - release v0.11b0

release v0.11a4