Added ztask_job_manager and ztask_node_manager classes
Added ztask_job and ztask_node
Added ztask_job and ztask_node
Added simple job and simple node implementaion
Usage (order is not important):
   start one 'ztask_job <num subjobs>' and several 'ztask_node'
Merge pull request #5 from mvala/master

Simple job and simple node implementaion