bug compare_epickd
compile old code with g++ 4.9
added code for cgal 4.6
more Epick_d test with good results
new Epick_d hash test with surprising results!
added hash test for Epick_d on CGAL 4.6
corrected Laplace algorithm and minor in interface
comments on about g++ versions
improved Laplace for d>7 (not tested correctness)
added LinBox interface for CGAL
changed test_algorithms to be able to redo tests
added script to compare Bird and Bareiss
added maple code to run bareiss
corrected maple output
compile the determinant test
added matrix output in maple format in det tests
put better names to the tests