adapted parameter.xml. reduced initial timestep suggestion

doc/default_files/parameters.xml

@@ -81,8 +81,7 @@ adding an empty line, make text **bold** or ``monospaced``.
       <definition> Order of the finite element method used. Values &gt; 1 are not
         thoroughly tested. </definition>
       <suggestion> 1 </suggestion>
-      <values> 0, 1, 2 </values>
-      <comment> Values &gt; 1 are not thoroughly tested </comment>
+      <values> 1, 2, 3 </values>
     </parameter>
 
     <parameter name="gridFile">
@@ -182,7 +181,7 @@ adding an empty line, make text **bold** or ``monospaced``.
     <parameter name="startTimestep">
       <definition> Value of the first time step in seconds. </definition>
       <values> float </values>
-      <suggestion> 1000 </suggestion>
+      <suggestion> 100 </suggestion>
     </parameter>
 
     <parameter name="maxTimestep">