[E-ACSL] fixed non-termination issue in presence of RTEs in RTE
[E-ACSl] pre-analysis: additional verbosing messages (level 4)

[E-ACSL] fixed bug with global declarations involved in the memory model (btw fixed but #1392)
[E-ACSL] additional feedback messages

[E-ACSL] code of e_acsl_assert put in e_acsl.c (no more in e_acsl.h)

[E-ACSL] convert postcondition even in presence of untranslated assigns clause
[E-ACSL] fix bug when the translation of a predicate containing \at is abruptely stopped because of a not-yet-implemented construct (the generated code contained undeclared __e_acsl_at variables)

[E-ACSL] visit E-ACSL's library files slightly faster

[E-ACSL] prevent runtime errors in annotations (all of them)
[E-ACSL] fixed bug in interpretation of \valid(\at(...))
[E-ACSL] fixed bug in interpretation of locals in blocks involved in memory model

[E-ACSL] fixed first part of bug #1304: call _initialize instead of _full_init for left-values which are not variables