move creation of website scripts to setup script

Instead of creating the website wrapper scripts with cmake,
they are now created when --setup-website is called. The
setup of the configuration constants is directly embedded
into the scripts. This means we can get rid of the separate
settings-frontend.php. More importantly however, it means
that it is now possible to set up multiple website directories
from the same build directory.

lib/lib.php

@@ -134,6 +134,24 @@ function addQuotes($s)
     return "'".$s."'";
 }
 
+function fwriteConstDef($rFile, $sConstName, $value)
+{
+    $sEscapedValue;
+
+    if (is_bool($value)) {
+        $sEscapedValue = $value ? 'true' : 'false';
+    } elseif (is_numeric($value)) {
+        $sEscapedValue = strval($value);
+    } elseif (!$value) {
+        $sEscapedValue = 'false';
+    } else {
+        $sEscapedValue = addQuotes(str_replace("'", "\\'", (string)$value));
+    }
+
+    fwrite($rFile, "@define('CONST_$sConstName', $sEscapedValue);\n");
+}
+
+
 function parseLatLon($sQuery)
 {
     $sFound    = null;