Completion support refactored: - created an abstract superclass to ease customization of completion support. - stx_libwidg class>>classNamesAndAttributes fixed so classes are listed in load order and package checker does not report any issues.

notes
makefile
libwidg.*
libwidgInit.c
.listOfSTfiles
.dependencies
*.H
*.STH
*.exp
*.obj
*.dll
*.lib
*.ilk
*.pdb
*.sbr
*.c
*.sc
*.xc
*.vcw
*.wsp
so_locations
classList.stc
objbc
objvc
objmingw
*.@@@