GitLab

New typing, proved sound. Also, expressions do not contain machine precision anymore in the case of variables

implemented a new analysis phase to assign a valid but random
precision assignment for each variable.

I also simplified the double pattern matchings used in Expressions.v

Conflicts:
	coq/CertificateChecker.v
	coq/ErrorBounds.v
	coq/ErrorValidation.v
	coq/Expressions.v
	coq/IntervalValidation.v
	coq/ssaPrgs.v

Typing of expressions is done. However, there are still some admits in the proofs, to be fixed in the following days.

Finish porting proofs to new semantics

See merge request !86

Simplify abstract environment generation and fix bug that would omit parts, when a unary operator is encountered

/ ! \ not compiling