--adding google-test 1.7.0  include and lib files
  see https://code.google.com/p/googletest
-Makefile is changed to incorporate unit testing with google-test framework
	--the google test framework is expected to be @ GIT-DIR/thordparty/gtest-1.7.0

-partial implementation of geometric hashing
	-kgGeometricHashing.hpp has the implementation.

	--In spotIt::processCircle, after clustering of contour-points, approximate the contours , for drawing and for geometric hashing
	-In spotIt::processCircle, Optionally try out SIFT features of contours and draw them (this functionality is turned off now)
	-In spotIt::processCircle, collect all valid cintours fior each cluster into pointCusters, and do geometric hashing

-geometric hashing uses a hash function which is similar to p-stable LSH
       http://www.mit.edu/~andoni/LSH/