* the student will have to browse elf structure file
* we will tamper the signature of the filem .ELF
* we will ask them to modify the entry points, two times:
	* 1. at main, it should not work (no stack allocation)
	* 2. directly at call_me function
	* 3. which is the start symbol
	* 4. what is a system map
	* 5. what does readelf -e says about sections?

Building the archive
====================
make exe_archive
publish change-header.zip


XXXX
====
Make sure that ./main.bad can be unscrabled by the solution (especially
		the call_me part. The functions offsets (main, _start, call_me) should
be checked after each compilation