Changeset 403 for sans/Dev/trunk/NCNR_SANS_Utilities

Adding reading of canSASXML data to Analysis package.

Notes:

• Names datafolders from title of dataset to cope with multiple datasets per file, but there is no checking for collisions other than to pop up the "this has been loaded before" dialog.

• I've put them in a "Common" folder as we should be moving to common data file handling.