fix bug #23, init and update submodule before use it
add parameter -p for mkdir to prevent error message if dir already exist
Merge branch 'make_instance_dir' of https://github.com/PeterDaveHello/foldingathome into PeterDaveHello-make_instance_dir
upgrade kernel version from 3.13.5 to 3.13.6
Merge branch 'kernel_3.13.6' of https://github.com/PeterDaveHello/foldingathome into PeterDaveHello-kernel_3.13.6
improve code