Updated wording as suggested by @gruehle

Author: Jonathan Diehl

src/index.html

@@ -131,16 +131,17 @@
                 return;
             }
             document.write("<h1>Missing libraries</h1>");
-            document.write("<p>The following required libraries were not found:</p>");
+            document.write("<p>Oops! One or more required libraries could not be found.</p>");
             document.write("<ul>");
             for (key in deps) {
                 if (!deps[key]) {
                     document.write("<li>" + key + "</li>");
                 }
             }
             document.write("</ul>");
-            document.write("<p>If you have checked up Brackets from github, please update the submodules by running the following command:</p>");
+            document.write("<p>If you are running from a local copy of the Brackets source, please make sure submodules are updated by running:</p>");
             document.write("<pre>git submodule update --init</pre>");
+            document.write("<p>If you're still having problems, please contact us via one of the channels mentioned in the <a target=\"blank\" href=\"../README.md\">README</a></p>.");
             document.write("<p><a href=\"#\" onclick=\"window.location.reload()\">Reload Brackets</a></p>");
         }, 1000);
     </script>