This is a prototype of MELD in Prolog. For a full description,
check:

	A Language for Large Ensembles of Independently Executing
Nodes, Michael P. Ashley-Rollman, Peter Lee, Seth Copen Goldstein,
Padmanabhan Pillai, and Jason D. Campbell. In Proceedings of the
International Conference on Logic Programming (ICLP '09), July, 2009.

	Meld: A Declarative Approach to Programming Ensembles. Michael
P. Ashley-Rollman, Seth Copen Goldstein, Peter Lee, Todd C. Mowry, and
Padmanabhan Pillai. In Proceedings of the IEEE International
Conference on Intelligent Robots and Systems (IROS '07), October,
2007.


Supported:
	- basic semantics
	- aggregates
	- updates
	- delete

Unsupported:
	- distributed execution :)