start working on the linker.
class.[ch]:
redo class defs so the pointer works (needs relocs still)
obj_file.h:
add prototype for read_obj_file, QFO_* data access macros and include
pr_debug.h
type.[ch]:
separate type system initialisation and recording of the standard types
so find_type works properly in multiple compilation
def.c:
don't mark static defs as initialized
expr.c:
proper class pointer def stuff
immediate.c:
clean out dead vars/code
obj_file.c:
allocate space for the line info and bail if the file can't be opened.
qfcc.c:
register the standard types for each compile pass and start linking the
files
