Add --usage to sattach to quiet test16.1.

More command line option trimming.

completely anyway when the HP patch arrives...).

tmpdisk, constraints).

removed convert_to_kilo replaces with convert_num_unit which will only convert the number in bluegene mode.

Move reading of job allocation environment variables into a standalone
function, seperate from parsing of SLAUNCH_ variables.

ok things are ready to start the sub divide of the partitions, works just like it did before but now we are able to in and change things

step launch struct.

in index lists AND in ranges.  Here is how negative numbers work in
ranges:

 If both numbers in a range are of the same sign (both positive, or both
 negative), then the range counts directly from the first number to the
 second number; it will not wrap around the "end" of the node list.

 If the numbers in a range differ in sign, the range wraps around the
 end of the list of nodes.

 Examples: Given a node allocation of foo[1-16]:

	-2-3  (negative 2 to positive 3) becomes foo[15-16,1-4]
	3--2  (positive 3 to negative 2) becomes foo[4,3,2,1,16,15]
	-3--2 becomes foo[14-15]
	-2--3 becomes foo[15,14]
	2-3   becomes foo[3-4]
	3-2   becomes foo[4,3]