Updating help message in CodeExplorer

Author: Adarsh Pyarelal

delphi/apps/CodeExplorer/templates/help.html

@@ -10,9 +10,12 @@ <h5 class="modal-title" id="helpModalLabel">About</h5>
             </div>
             <div class="modal-body">
               Input Fortran code in the code editor area and hit the
-              'Submit' button. Two examples are provided to get started. Both
-              of these have been taken from <a
-                href="https://dssat.net">DSSAT</a>.
+              'Submit' button. Three examples are provided to get started. The
+              first one is a toy program that demonstrates basic Fortran code
+              idioms (main, subroutine, loops, conditionals). The second and
+              third programs are implementations of two different models of
+              calculating potential evapotranspiration, taken from 
+              <a href="https://dssat.net">DSSAT</a>.
               <ul>
                 <li>
                   <a