change absurd with closed
Added header R10 and R12
Common objects group codes
Correction
Added R13 header
Added R14 header
Added link to ACADVER.html
Possible versions of
Added link to hatch.html
Added R15 header
Merge remote branch 'bertmaster/master'
Correction
Added 2004 header
Added 2007 header
Added 2011 header
Added sample release 10
Merge branch 'master' of git://github.com/paolo-caroni/libdxf into 'origin/master'.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>