fixed potentially nasty integer divide/multiply order bug that would have been causing rounding
Added brackets and comments to highlight
Merge branch 'master' of github.com:robbymckilliam/ScalaNumbers

Conflicts:
	test/numbers/matrix/MatrixTest.scala
added unary - to Matrix
added an overloaded apply method to conveniently access row and column vectors with a single index
added code for constructing row and column matrices.  Probably not ideal and the moment