Make index.php bootstrap line use same code of WP

to avoid issues with scripts relying on that line.

See #35

Author: gmazzap

wpstarter/templates/index.example

@@ -14,4 +14,4 @@
 define('WP_USE_THEMES', true);
 
 /** Loads the WordPress Environment and Template */
-require realpath({{{BOOTSTRAP_PATH}}});
+require( {{{BOOTSTRAP_PATH}}} );