Implement Heap allocation (#3)

* Implement Maloc

* Implement Dealloc

* Migrate to a struct based heap implementation

README.md

@@ -8,9 +8,14 @@ NovaOS is a expository project where I build a kernel from scratch for a Raspber
 
 - Delay and sleep ✓
 - UART ✓
+- Switching ELs ✓
 - GPIOs ✓
 - GPIO Interrupts ✓
 - Communicate with peripherals via mailboxes ✓
 - Frame Buffer ✓
+- Heap Memory allocation ✓
+- Multi Core
+- Dynamic clock speed
 - MMU
+- Multiprocessing
 - Basic Terminal over UART