cafe_sam modifications

• p21-br-06 March 16, 2008 : Update error handling to make some error fatal.
• p18-br-09, p21-br-05 June 10, 2008 : Fix exception handling from Robert Illingworth.
• p21-br-04 Nov 14, 2007 : Update integrated tests.
• p18-br-08, p21-br-03 Oct 2, 2007 : Add SAMGridExpander.
• p18-br-07 : Add integrated test to test backward compatibility to p18.05.00 caf trees.
• p18-br-06 : Delay resolving variables in Config
• p18-br-05 : Changes for SAM v7 libs