Remnove autogenerated files
Remove doc utils from EXTRA_DIST
as-version.m4 not used, remove it
as-ac-expand.m4 not used. remove it
just use MATE_COMPILE_WARNINGS(maximum) and remove custom macros
Remove 2 forgotten autogenerated files
Remove custom macros from EXTRA_DIST
Correct EXTRA_DIST
Generate ChangeLog from git log
Make tar.xz instead of tar.bz2
Merge pull request #34 from infirit/master

Remove obsolete/autogenerated files and update EXTRA_DIST