Fixed some typos in help files.
Fixed some incorrect logic in conditional compilation for CatVSTable with different facilities.
Use proper save path in UCALC so that the suggested .bt5 ending is preserved.
--this line, and those below, will be ignored--
M trunk/NCNR_User_Procedures/Reduction/SANS/CatVSTable.ipf
M trunk/NCNR_User_Procedures/Reduction/USANS/U_CALC.ipf
M trunk/NCNR_Help_Files/Scattering_Simulation_v1.0.ihf
M trunk/NCNR_Help_Files/SANS_Reduction_Help_v5.20.ihf
M trunk/NCNR_Help_Files/SANS_Model_Docs_v4.10.ihf
M trunk/NCNR_Help_Files/SANS_Analysis_Docs_v4.10.ihf
M trunk/NCNR_Help_Files/USANSReductionHelp_v2.3.ihf