More work on datatypes theory combination: fix bug in care graph, do not assign values for EQC of datatype type that contain only terms belonging to other theories, do not treat APPLY_UF as congruence operator, communicate equalities involving terms of external kind.  Minor fixes for fun_def_process.  Other minor changes.
Fix get-bug-attachments script.
Merge branch '1.4.x'
Fix model bug in --mbqi=fmc.  Minor cleanup in datatypes.
Reenable regression.  Add (for now, disabled) changes to datatypes theory combination.  Relax communication of dt facts.
Minor fix for getInstCons
sygus input language and benchmark