[svn-r6989] Initial draft of the load-leveler bootstrap server. This is a
restrictive model that functions under the following constraints (mainly because of the inflexibility of POE): 1. The load-leveler scripts cannot specify more than one tasks per node. The number of tasks per node need to be specified to mpiexec using the -ppn option. 2. The number of processes being launched need to cover all of the allocated nodes.