recent changes for Cray system support

to create job allocation.

    --mem-per-cpu options on a heterogeneous cluster. Patch from Bjorn-Helge
    Mevik, University of Oslo.

have slurm srun command installed on a cray system instead of the wrapper.

to function as desired.

Conflicts:
	src/plugins/select/bluegene/ba_common.c
	src/plugins/select/bluegene/ba_common.h

in the resource allocations in any dimension. Also change the 4D to 1D bitmaps so that
position 1,0,0,0 has bit 1 instead of position 0,0,0,1 (for consistency with the
other node bitmaps).

The `.rst` extension stands for reStructuredText, one of the markup formats
supported by github.  The tool they use to render your `README.*` and the list
of markup languages it supports can be found here:
    https://github.com/github/markup

reverted more of the change from Gerrit since the last revert made functions that aren't used anymore.