[DRMAA-WG] Torque/PBS DRMAA - drmaa_wi* POSIX equivalents II

Issue: Removing drmaa_wif* routines and introducing one-call semantics could lead to more clear, consistent and informative job life cycle graph. For example, additionally to the existing job states returned by drmaa_job_ps(), we could imagine also states such as DRMAA_JOB_PS_COREDUMPED or DRMAA_JOB_PS_SIGNALLED. --------- If the drama_w* functions are present, this is not necessary. If one day the drama_wif* routines are gone, we might need extensions mechanism (like some other groups, JSDL or SAGA?) for the job states to avoid explosions of states and implementation complexity. This is clearly future versions staff. -Hrabri