update code and oracles according to Frama-C changes, in particular interpretation of \valid in presence of const

[E-ACSL] fix typing bug with divisions/modulos over floats

[E-ACSL] add missing test

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

[E-ACSL] prevent RTE while executing memory-related constructs

[E-ACSL] compute a more precise type for quantified variable with a strict upper bound
[E-ACSL] do not modify the type of a quantified variable anymore

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

[E-ACSL] do not preprocess files twice

[E-ACSL] fixed bug #1307 (typing crash in presence of reals)
[E-ACSL] fixed bug in the pre-analysis on function call
[E-ACSL] fixed bug with non-integer operators with a GMP operand

[E-ACSL] fixed bug #1298 about \valid(v) when v is a formal