Add cppunit-1.12.1
add some code for AABB's
add basic unit tests

test should fail for now
Fix failing unit tests
add armadillo-3.6.2 to thirdparty
add sphere objects

the unit test fails, known problem
add missing .a file
Clean up code and fix unit test failure

Fix unit test failure.
Clean up code to use Point struct.  Convert to a vector right
before using armadillo.
Add another unit test to test for close collisions.
Merge branch 'collision_detection'