many minor changes after real VSANS data collected.
additional procedures added to allow easy correction of the incorrect header information from NICE.
Most notable addition is the pinhole resolution added to the calculation and the I(q) output. White beam is also treated (incorrectly) as a gaussian distrivution, but the results of smeared fitting look to be quite good.
Trimming and sorting routines are now (pinhole) resolution aware.
File identification routines have been updated to use the proper definitions of "purpose" and "intent". Both fields are now in the catalog, to allow for better sorting.
