included global_defs.h into course_os.img
updating dev with master
update with master
moved libc to klibc as recommended
forgot to move header to klib as well
print f works, call using os_printf

now everyone can start debugging
merged printf function from klibc
merged mmap.h file to consolidate PIC addresses (and some useful macros)
succesfully compiled initvm.o into kernel
[bug] prints CourseOS! twice in start.c
merged with dev