Project 4.
============

Implement the context sequence matching algorithm with regular
constraints.


Literature

T. Kutsia, M. Marin. Matching with Regular Constraints. Proc.
LPAR'05. Volume 3835 of LNAI. Springer, 2005. 215-229.
http://www.risc.uni-linz.ac.at/people/tkutsia/papers/KutsiaMarinLPAR05-Final.pdf