included global_defs.h into course_os.img
Very basic bump pointer memory manager
updating dev with master
update with master
merged printf function from klibc
modified bump pointer allocation
merged mmap.h file to consolidate PIC addresses (and some useful macros)
Merge with dev
fixed bump pointer allocation to allocate by word

continue to pass in byte value and it will return words
Merge branch 'memory_management' of github.com:rellermeyer/course_os into memory_management
Accidentally deleted a function from uart.c

Also added a os_printf to argparse.c
Merge branch 'memory_management' of https://github.com/rellermeyer/course_os into argparse

Conflicts:
	kernel/Makefile
More work on getting tests to run via qemu command line

Added more objects to Makefile
Used os_printf instead of printf