Commit Friday evening.

PDFA and EXFO Laser are now part of the family

Functions/helper_functions_community/schemer/CONTRIBUTING.md

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+Contributing
+============
+
+Adding a new colour scheme
+--------------------------
+
+If you have created a new colour scheme, please add it to the [matlab-schemes]
+repository and *not* here. Instructions for this are available
+[here](https://github.com/scottclowe/matlab-schemes/blob/master/CONTRIBUTING.md).
+
+If you have already added a new colour scheme to [matlab-schemes] via an
+accepted pull request and want to mirror the change in [matlab-schemer], you
+will need to use [git-subtree].
+
+Some general handy instructions for `git subtree` are available
+[here](https://medium.com/@v/git-subtrees-a-tutorial-6ff568381844#.lwmv2uwwk),
+[here](https://blogs.atlassian.com/2013/05/alternatives-to-git-submodule-git-subtree/),
+and [here](https://developer.atlassian.com/blog/2015/05/the-power-of-git-subtree/).
+Specifically for use with this repository, the instructions are as follows.
+
+You will first need to set up subtree so there is a remote tracking the
+[matlab-schemes] repository in addition to the usual origin remote tracking
+your fork of [matlab-schemer].
+```bash
+# One-time setup
+git remote add matlab-schemes https://github.com/scottclowe/matlab-schemes.git
+```
+
+Having done this setup, you can now merge commits from matlab-schemes into
+matlab-schemer as follows:
+```bash
+git pull
+git subtree pull --prefix schemes matlab-schemes master
+git push
+```
+
+Improving MATLAB Schemer
+------------------------
+
+If you have made enhancements or bug fixes to MATLAB Schemer, itself please add
+them with a regular [pull request] to this repository.
+
+
+  [matlab-schemer]: https://github.com/scottclowe/matlab-schemer
+  [matlab-schemes]: https://github.com/scottclowe/matlab-schemes
+  [git-subtree]: https://github.com/git/git/blob/master/contrib/subtree/git-subtree.txt
+  [pull request]: https://help.github.com/articles/using-pull-requests/