Add infra-structure to enable and manipulate page tables in the
processor.

Signed-off-by: Carlos Maiolino <cem@toxiclabs.cc>

Signed-off-by: Carlos Maiolino <cem@toxiclabs.cc>

Use the heap API to implement a 100MiB heap to
be used by the kernel code.

Add example usage to src/kernel.c

Signed-off-by: Carlos Maiolino <cem@toxiclabs.cc>

Add a simple API implementing a heap memory area.

This specifies 2 main data structures:
	struct heap - Defines a heap:
		Holds a table with all entries in the specific heap and
		the initial heap memory address

	struct heap_table - Describes the usage state of every PAGE
			    within the specific heap.

Signed-off-by: Carlos Maiolino <cem@toxiclabs.cc>