Added script test_option which:
- compile and run without option
- compile with option given as argument, run
- diff on the two outputs, fails if different outputs
config file checks for existence of compiler (fails if not exist)
statics1.ept is a copy of statics.ept ; statics2.ept depends on statics1.ept
instead of statics.ept (so as dependency order => lexical order on file names)
