Merge pull request #6 from bbarker/master

Vector and Col Matrix sum
Updating: improving contrib/libfloats
Updating: merging.
Updating: reorganizing gmatrix and libfloats.
Updating: improving libfloats/blas and libats/gmatrix
Cleaning up.
Updating: improving libfloats/blas.
added LU signature
Merge remote-tracking branch 'upstream/master' into develop
Updating: improving libfloats/blas_gemm.
Merge remote-tracking branch 'upstream/master' into develop
Updating: adding some doc and testing code for libfloats/blas.
Merge remote-tracking branch 'upstream/master' into develop
Update: very minorly improving.
Updating: improving libfloats/blas_gemm
Merge remote-tracking branch 'upstream/master' into develop
Updating: improving libfloats/blas_gemm
Merge remote-tracking branch 'upstream/master' into develop
Some gnumber additions/comments; LU pseudocode (likely buggy)