Remove author whose code has since been superceded, rendering the att…

…ribution no longer appropriate. Thanks again Dr. Thomin!

Note deprecations in README.

Prep 1.3.1

Announce intention to reduce ability to subclass and override.

Add Matrix Concatenation

Merge pull request mcordingley#27 from brad-jones/master

Fixes mcordingley#26

Update README.md

Update composer docs.

Bugfix release

Release candidate