Improved build system

Added new entries to .gitignore
Moved away from source directory as central spot for all source code

kernel/timer.cpp

@@ -0,0 +1,27 @@
+#include "timer.h"
+
+uint32_t tick = 0;
+
+
+static void timer_callback (registers_t regs ){
+    tick ++ ;
+    kterm_writestring ("tick passed!");
+}
+
+void init_timer (uint32_t frequency){
+    // register timer callback
+
+    uint32_t divisor = 1193180 / frequency;
+
+    // Send the commmand byte
+    outb(0x43, 0x36);
+
+    // Divisor has to be sent byt-wise , so will send lower then upper bytes
+    uint8_t low = (uint8_t) (divisor & 0xFF);
+    uint8_t high = (uint8_t) ((divisor >> 8) & 0xFF);
+
+    outb(0x40, low);
+    outb(0x40, high);
+
+
+}