Added Scala backend to the source distribution
Added Scala backend to the source distribution


Former-commit-id: 1eda3442eb047dfea6f0590a08067c10e9132aa2 [formerly c24856aef8932e71b38c126286997c36b699715e] [formerly 47cbbfbd13a93b0dd65004029716f63fe2b5a938]
Former-commit-id: 08353095b72ecbfe20fe756b134fd7924f53ee45
Former-commit-id: 3f40345bd548ac490e61b2fff81b99e3e09b4230
DEIB-GECO/PyGMQL,DEIB-GECO/PyGMQL