Top level cmake: Turn off by default with 2.8.5 < cmake < 2.9.0 to work around cmake28 and boost libraries problem on centos 6. Boost_NO_BOOST_CMAKE was introduced int cmake 2.8.6. Make external gf complete and jerasure external projects build with empty kfs directory prefix.
Top level cmake: Turn off by default with 2.8.5 < cmake < 2.9.0 to work around cmake28 and boost libraries problem on centos 6. Boost_NO_BOOST_CMAKE was introduced int cmake 2.8.6. Make external gf complete and jerasure external projects build with empty kfs directory prefix.

chanwit/qfs,chanwit/qfs,thebigbrain/qfs,quantcast/qfs,thebigbrain/qfs,thebigbrain/qfs,fengshao0907/qfs,chanwit/qfs,quantcast/qfs,chanwit/qfs,quantcast/qfs,chanwit/qfs,qnu/qfs,quantcast/qfs,chanwit/qfs,fengshao0907/qfs,fengshao0907/qfs,qnu/qfs,qnu/qfs,qnu/qfs,quantcast/qfs,thebigbrain/qfs,thebigbrain/qfs,qnu/qfs,qnu/qfs,thebigbrain/qfs,fengshao0907/qfs,thebigbrain/qfs,quantcast/qfs,chanwit/qfs,qnu/qfs,fengshao0907/qfs,qnu/qfs,chanwit/qfs,fengshao0907/qfs,quantcast/qfs,quantcast/qfs,thebigbrain/qfs,fengshao0907/qfs,fengshao0907/qfs