Merge pull request #13 from griera/master

Fix proper EFAULT errno value when access_ok() returns error. Also adds a script test1x1.sh that automates running tests one by one.
Test [3] Works!!

Faltava passar els valors de pid i st pels registres a quan es crida a
int $0x80
Compiling for E2
Merge branch 'master' of github.com:griera/zeos into griera-master

Conflicts:
	Makefile
	system.c
	test1x1.sh
	user.c