Improved build system

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

kernel/drivers/serial/serial.cpp

@@ -0,0 +1,19 @@
+#include "serial.h"
+
+Serial Serial::init() {
+    // No clue what to setup yet!
+
+    return Serial();
+}
+
+void Serial::print(){
+    // Do nothing!
+}
+
+Serial::Serial(){
+    // Do nothing!
+}
+
+Serial::~Serial(){
+    // Do nothing!
+}