Delete old GMachine stuff
Rename rtgRts director to rts. Delete example.c
Clarify comment on Let constructor
Hide pp and expose new ppStg function instead. Temporary until PrettyPrint class is used in core pretty printer as well
Add Show and Eq derived instances for STG AST types
Add core -> STG translator module
Fix STG import
Fic STG import. Explicit export of compile only
Temporarily modify typecheck to accept dumpInt as a built-in function
Get STG-based compiler hooked up to main
Add test core file based on first STG test program