linear.qr returns [:Q, :R] by default
diagonal-matrix now returns matrix of current implementation
Merge pull request #168 from Gerrrr/qr_compact_option

linear.qr returns [:Q, :R] by default
Merge pull request #169 from Gerrrr/bug/diagonal-matrix-implementation

diagonal-matrix now returns matrix of current implementation
tests added for linear.qr default return values
Merge pull request #170 from Gerrrr/qr_compact_option

tests added for linear.qr default return values
add summation operator
Merge branch 'develop' of https://github.com/mikera/core.matrix.git into develop
add product operator
Merge pull request #171 from tbrooks8/develop

Join-along implementation