Move pages -> views for consistency, which simplifies the life of the File_Structure_Test

installer/views/environment_errors.html.php

@@ -0,0 +1,19 @@
+<h1> Whoa there! </h1>
+
+<p class="error">
+  There are some problems with your web hosting environment
+  that need to be fixed before you can successfully install
+  Gallery 3.
+</p>
+
+<ul>
+  <?php foreach ($errors as $error): ?>
+  <li>
+    <?php print $error ?>
+  </li>
+  <?php endforeach ?>
+</ul>
+
+<p>
+  <a href="index.php">Check again</a>
+</p>