included global_defs.h into course_os.img
Very basic bump pointer memory manager
Merge remote-tracking branch 'origin/memory_management' into process_abstraction

 Merging memory management into process_abstraction branch.
Initial initialization of processes

added process_create
added pcb_table
added traversal of pcb_table for free slots
setjmp and longjmp copied from MUSL for potential future use