Add missing INSTALL file. Use standard GNU file on building tarball
README may have been updated
Remove AUTHORS file as it is empty and no content available yet.
Remove NEWS file as it is empty and no content available yet.
The git generated ChangeLog replaces the hand written one.
Update configure.ac to xorg-macros level 1.3.
Use XORG_DEFAULT_OPTIONS which replaces four XORG_* macros
Update Makefile.am to add ChangeLog target if missing
Remove ChangeLog from EXTRA_DIST or *CLEAN variables
This is a pre-req for the INSTALL_CMD
