Merge pull request #5 from bbarker/master

a few gmatrix additions.
Updating: adding code to libats/gvector and libats/gmatrix.
Updating: improving libats/gvector and libats/gmatrix
Updating: improving libats/gmatrix.
Updating: improving libats/gmatrix.
Updating: improving libats/gmatrix
Updating: improving libats/gmatrix.