doc update for gmake in bsd userland and spelling fix

doc/index.html

@@ -643,7 +643,7 @@ USE_OSGPLUGIN(<plugin2>)
            unzip wget yasm</pre>
 
     <p>
-    Ensure that /usr/local/bin preceeds /usr/bin in your $PATH:
+    Ensure that /usr/local/bin precedes /usr/bin in your $PATH:
     </p>
     <p>
     For C style shells, edit .cshrc
@@ -729,7 +729,9 @@ sudo gcc_select gcc42</pre>
     <p>
     All build commands also download the packages if necessary.
     </p>
-
+    <p>
+    In a BSD userland, substitute "make" with "gmake".
+    </p>
     <dl class="usage">
 
     <dt>make</dt>