Merge pull request #6 from miavisa/css

Css Space search and inject.
Added Gecode::linear propagator to fd module.
- Full support of Gecode::IntVarArgs (tuples, lists and records)
- Created function getIntArgs (parsing int arguments to Gecode::IntArgs)
Merge pull request #7 from carealejo/master

getIntVar, Linear, Full getIntVarArgs
Builtin Distinct2 and getIntArgs with tuple support.
Merge pull request #8 from carealejo/master

Distinct2