Rewrite matrix operations to use object system.
update info line at the top
stubbing out graph-matrix test framework
add graph-matrix-test system definition
Developed tests for graph-matrix
Merge branch 'master' of github.com:eschulte/graph

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Most tests work
Removed a test
* graph.lisp: Removed to-adjancency-matrix
* graph-matrix.lisp: Renamed to-adjacency-matrix-new to to-adjacency-matrix
* test/graph-matrix.lisp: Changed to-adjacency-matrix-new to to-adjacency-matrix
* package-matrix.lisp: Changed to-adjacency-matrix-new to to-adjacency-matrix
* graph-matrix.lisp: Got rid of femlisp warnings due to wrong types
* test/graph-matrix.lisp: Working on distance matrix test
* test/graph-matrix.lisp: Fixed digraph-and-distance-matrix test
* graph-matrix.lisp: Check that limit is sensible in to-reachability-matrix
* test/graph-matrix.lisp: Added test for LIMIT in to-reachability-matrix
* graph-matrix.lisp: Added an assertion for LIMIT
* graph.lisp: Modified docstring of add-edge
reverse-edges reverse node order in a graph's edges