added vim ~ file to .gitignore
reverted uart.c to original
no longer building against the host's include path
made _Reset global to eliminate linker warning.
added an initial userland with a stripped-down libc that barely does more than attempting a printf
Merge branch 'dev' of https://github.com/rellermeyer/course_os into dev

Conflicts:
	.gitignore
	kernel/uart.c