Gong Xiangyang <83904580@qq.com>
        Massive performance improvements changing the refs
        list to a tree.

Dmitry Sinyavin <s0me0ne@s0me0ne.com>
        dwgadd fixes.

Michal Josef Špaček <michal.josef.spacek@gmail.com>
	Work on all preR13 formats.

Denis Pruchkovsky <denis.chausy@gmail.com>
	Many memory leak and spec fixes.

Reini Urban <rurban@cpan.org>
	Many fixes and enhancements everywhere. Start with support for all
        DWG versions, and adding the missing bits. The current maintainer.

Gaganjyot Singh <thegaganx@gmail.com>
	Wrote dwg_api, testsvg2 (now dwg2svg2), testcases, unit-testing.

Achyuta Piyush <achyutapiyush@gmail.com>
	Wrote the xml test suite

Anderson Pierre Cardoso <apierre.cardoso@gmail.com>
	Changes to configure.in, dwg.c and encode.c

Thien-Thi Nguyen <ttn@gnuvola.org>
	First versions and changes to several Makefiles.
	First version and changes to build-aux/create-changelog.

Till Heuschmann <theuschmann@gmail.com>
	Substantial changes to dwg.h, dwg.spec and decode.c. R2004 + R2007
	read support.

James Michael DuPont <JamesMikeDuPont@googlemail.com>
	Changes to Makefile.in, Makefile.am, src/bits.c, src/bits.h,
	src/common.h, src/decode.c, src/dwg.c, src/dwg.h, src/encode.c,
	examples/testSVG.c to conform to C++ compiler.

Rodrigo Rodrigues da Silva <pitanga@members.fsf.org>
	First version of logging.c. Substantial changes to several files
	under src/.

Felipe Corrêa da Silva Sanches <juca@members.fsf.org>
	First version of testSVG.c and src/dwg.spec. Substantial changes
	to several files under src/.

Felipe Emmanuel Ferreira de Castro <felipo@users.sourceforge.net>
	Original author. First version of src/bits.c, src/bits.h,
	src/common.h, src/common.c, src/decode.h, src/decode.c, src/dwg.h
	src/dwg.c, src/encode.c, src/encode.h.
