Merge pull request #2 from xinxinsh/ceph-v3.0

add autoconf and automake support
Makefile.am: use custom vars instead of resetting common ones

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Makefile.am: use subdir-objects

This should work across more versions of automake

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
configure.ac: lower autoconf version requirement

Signed-off-by: Sage Weil <sage@redhat.com>
.gitignore: *~ and .dirstamp

Signed-off-by: Sage Weil <sage@redhat.com>
foo
remove GNU Make specific command

Signed-off-by: xinxin shu <xinxin.shu@intel.com>