[Makefile] Renamed e-acsl-runtime and e-acsl-reject test directories to runtime and reject respectively

[translation] add a missing cast when an integer is used in a floating point/real context (was revealed by a Value's change, and now reveals a bug with == over reals)

[quantif] updated according to AST changes: && is now left-associative

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

[E-ACSL] fix some headers and update TODO-list

[E-ACSL] improve user manual a bit
[E-ACSL] add missing test

[E-ACSL] add missing test

[E-ACSL] fixed bug in debug mode
[E-ACSL] add missing headers

[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] 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 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] 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