Fixed headers.

src/get_directory_description.m

 function flist = get_directory_description(basedir)
 
-% List recursively all the *.m files in a directory.
+% Lists recursively all the *.m files in a directory.
 %
 % INPUTS 
 %  - basedir [string], the name of the directory to be inspected.

src/initialize_unit_tests_toolbox.m

-% Get the path to the dates/src folder.
+% Get the path to the m-unit-tests/src folder.
 unit_tests_src_root = strrep(which('initialize_unit_tests_toolbox'),'initialize_unit_tests_toolbox.m','');
 
 if ~exist('isoctave','file')