Include memory protection mechanism into MemoryZone

[Harthann]

MemoryZone should be map in memory depending on their permission, allowing cpu to trigger a page fault when invalid access is performed by user.
During the pagefault handling, the kernel will analyze the reason behind this pagefault and either allocate memory for the user (stack overflow will result in growing the stack length) or sending him a signal (SIG_SEGV in case of permission error)