Changed collapse rule in BaseRegras.pl to avoid collapsing everything in the same path in the same node. Also changed the definition of neighbor.
Changed BaseRegras.pl to be compatible with input.xml
Added missing edges between activities in input.xml. Also changed, for testing and demonstration purposes, ent2 and en4 credits value from 40011 to 30011 and 39244 to 39844 (so we can see 2 collapses in entity path)
Changed PrologInference to be compatible with the new rules.

TODO: Migrate from SWI Prolog to Tuprolog