change groupid to com.ceph.fs
Merge pull request #2 from rootfs/wip-unit-test-merge

Add HDFS compatible FS unit tests; fix issues detected by unit tests
Merge pull request #3 from rootfs/wip-groupid

change groupid to com.ceph.fs
Merge branch 'master' of https://github.com/ceph/cephfs-hadoop into wip-cephfs-dep
up version to 0.80.1 to match libcephfs rev