(b) Fixing bugs in the benchmarks
(c) Makinging transformation phases of Orb ignore parts of the library

 * Expression grammars are now alwayse 'Labels -> Expr', simple grammars
   that are 'Type -> Expr' can simply extend SimpleExpressionGrammars

 * Labels now have Aspects. A label aspect describes a particular
   feature of the label (e.g. its size), as well as how this aspect
   applies to sub-productions.

   Aspects describe how sub-productions are generated/filtered/modified.
   See comments in Aspect for more information

terminatingCalls now returns calls with integers too.

IntInduction and all integer comparison rules are phased out. Instead
there is a single InequalitySplit rules which splits into (up to) 3 branches,
taking pc into account.

No more EqualitySplit for any other type, except generic types.

Isolate unused rules. Clean up Rules.

Improve QualifiedExamplesBank API

More reasonable return type for solveSATWithCores
CEGIS discards tests that crash the evaluator
Try harder to find verifiable solution in validatePrograms
Increase default CEGIS size

Additional fixes:
- move OneOf to grammars
- Propagate Terminating in IntroduceRecCall

Remove SafeRecursiveCalls from Grammars.default
IntroduceRecCalls keeps only examples that lead to no 'choose'
IntroduceRecCalls is normalizing
Make 1 benchmark tougher

See Stack Overflow question: http://stackoverflow.com/questions/32022588/why-the-wrongcommutative-timeout-in-the-propositionallogic-example-in-leon-onlin

Simplified the double list benchmark which works now.

Minor changes

MInor changes

(b) Preserving if-then-elze in the VCs
(c) Optimizing elimnation and UFADT reduction

ValueGrammar only generates one generic value.
GrammarDataGen will expand to all non-redundant value combinations.

Use GrammarDataGen instead of bonsai everywhere in Leon (except TEGISLike)

Question builder will now try to instantiate always different terminal values for better comparison.
Corrected benchmark out of order to not depend on each other;

And remove some extra whitespace