there are some occasions where we need to manage the mongos service startup outside of this module (especially when orchestrating environments in EC2, and we need to wait for config servers to start before starting mongos etc). provide a toggle to externally manage it, but configure using this module still
fix shebang for debian/ubuntu - some versions of sh (specifically on 12.04) dont support ulimit -u but bash 4.2 does (installed by default)
Merge pull request #35 from CpuID/master

flag to optionally manage mongos service startup + fix mongos/d shebang for ulimit