Add information files and first work
Begin writing doc, some fixes
add possibility to check ref files during result computation
Add argument to configure script of compilation unit

This argument is the path to the compilation unit folder, that allow to use
files from that diretory for configuring.  For example it may now generate a
file rules.mk with '-I..,' option as CPPFLAGS, useful to include headers from
the compilation unit directory for compilation.
create trace generator script for xml trace
Handling signals, check ref files

Add signal handling during test execution
Add check between test output file and a reference file
Bug fix + use '#! /usr/bin/env bash'
Fix + add Makefile
Fix forgotten 'then' and '{' + add usage for scripts
Fix XML trace generator
Fix a lot of thoughtlessness errors
Little fixes on logs
Fix \n in error outputs and change rights for compile scripts.

During pre-processing, the scripts 'compile_student.sh' of each
compilaion unit are now set to be readable and executable by 'others'.
Give M_MAKE as argument of 'compile_student.sh' scripts
Fix a bug in kill_timeout (bash can't compute decimal value)
Fix thoughtlessness mistakes
Bug fixes
Fix option format bug for cut
Update check import script

The check import script now exclude from imported symbols those exported
by another object file in the library (case of a stacic library ".a").
sandbox will return 42 if execv fails