Provide tarball (or better - put to Coin3D repo) for .m4 macros

Issue #26 resolved
Anonymous created an issue

Will all contents gone, without m4 macros it's impossible to bootstrap coin3d buildsystem.

Previous location:
http://hg.sim.no/simacros/default/file/c9c336b0ae4f/cfg/m4

Alternative approach:
Replace simacros with something less home grown or preferably switch to CMake.