Develop

Commented out a couple of short sections in the Householder/CanonTransforms lab. The first sections I commented out was a proof sketch, and I didn't think that the labs are the most appropriate places for proofs. The second section I commented out was part of a discussion of one of the algorithms, which to me was not adding a whole lot to understanding the algorithm. I also changed orthonormal to orthogonal in several places, since that seems to be the predominant usage when referring to matrices whose columns form an orthonormal basis.