HELIX: added dxf_helix_init().

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
HELIX: corrections in doxygen comments.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
HELIX: added dxf_helix_free().

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
Merge pull request #19 from paolo-caroni/master

I have rewrited old "made with libreoffice" documentation, I hope you like it!

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
HELIX: added dxf_helix_read().

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
ARC: corrections in writing order.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
tests: added golden files for an ARC entity.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
tests: added more golden files for an ARC entity.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
ARC: more corrections in writing order.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
tests: added golden files for a CIRCLE entity.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
tests: added golden files for a HELIX entity.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
tests: added golden files for a LINE entity.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
correct TDINDWG and TDUSERTIMER in a new dxf file
Merge remote branch 'bertmaster/master'