epfl-lara/leon — pull request #40 by colder (2013-09-27 14:20:27+00:00)
Title: Re-introduce type hierarchy for solvers, simplify factories 

Solvers wrap solvers or factories, depending on the needs.
Factories no longer wrap factories, except for the special case of
timeoutsolverfactories (it does it in a typesafe way though).

Introduce basic solver combinators.

Fix TupleRewrite with new posts, fix ScopeSimplified, Fix pretty printer