Generate .tar.bz2 on 'make dist'

Generate .tar.bz2 on 'make dist'

Automatically generate libcgroup*.tar.bz2 on 'make dist'. Some restructure
of AC_INIT and AM_INIT was needed to archieve this and correct output
filename.

Namely AC_INIT( [package], ... ) is used as resulting tarball file name now.

Also run automake and autoconf to refresh the generated stuff... Only
configure.in contains manual changes, everything else is autoconf/automake
bloat :(.

Signed-off-by: Jan Safranek <jsafrane@redhat.com>