[E-ACSL] e_acsl_assert now takes the crashing function in argument

[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] fixed bugs when calling 'generate_code' dynamically. BTW change the plug-in name of dynamic function

[E-ACSL] fixed bug when translating left-values with complex types (related to bug #1326)
[E-ACSL] fixed issue #1329: the 'requires' clause is now interpreted even if an other part of the precondition cannot be evaluated.

[E-ACSL] fixed bug in Pre_analysis with pointer arithmetics in logic
[E-ACSL] does not check some possible cases during pre analysis
Thx to two first items, fully fixed bug #1324

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

[E-ACSL] do not preprocess files twice

[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