Add Matlab-specific readme file

Makefile

@@ -15,6 +15,7 @@ matlab_pkg:
 	cp -ra COPYING tmp/${MATLAB_PKG_DIR}/
 	cp -ra CONTRIBUTORS tmp/${MATLAB_PKG_DIR}/
 	cp -ra NEWS tmp/${MATLAB_PKG_DIR}/
+	cp -ra README.matlab.md tmp/${MATLAB_PKG_DIR}/
 	pushd tmp; zip -r ${MATLAB_PKG_DIR}.zip ${MATLAB_PKG_DIR}; popd
 	mv tmp/${MATLAB_PKG_DIR}.zip .
 

README.matlab.md

@@ -0,0 +1,22 @@
+Running Doctest on Matlab
+=========================
+
+The Doctest package finds specially-formatted blocks of example code
+within documentation files.  It then executes the code and confirms
+the output is correct.  This can be useful as part of a testing
+framework or simply to ensure that documentation stays up-to-date
+during software development.
+
+The package is designed for Octave but aims to be compatible with
+Matlab as well.
+
+See `help doctest` for documention and other information.
+
+
+Installation
+------------
+
+To install on Matlab, download the `doctest-matlab-x.y.z.zip` file and
+unzip it somewhere.  Add it to your Matlab path (e.g., with the Matlab
+`addpath` command).  Type `doctest doctest` to have Doctest test
+itself.