Continuing terminal I/O

- Made stdio.h work
- Moved printFiletable back into kernel.c
- TODO: Add stdio.h to all files that should use it (probably next commmit)
- Added some more global addresses. There's a memory layout, but i'm not using it
- Got cursor to be drawn
- Calc program now gets user input

include/interrupt/idt.h

@@ -2,7 +2,6 @@
 #define IDT_H
 
 #include <stdint.h>
-#include <screen/text.h>
 
 #define TRAP_GATE_FLAGS    0x8f // P = 1, DPL = 00, S = 0, Type = 1111 (32-bit Trap gate)
 #define INT_GATE_FLAGS     0x8e // P = 1, DPL = 00, S = 0, Type = 1110 (32-bit Int gate)