Make base font repository path configurable via $wgULSFontRepositoryBasePath

This patch adds a configuration variable, '$wgULSFontRepositoryBasePath', which
specifies the base path to the font repository. By default, the variable is set
to its existing value, which is $wgExtensionAssetsPath +
'/UniversalLanguageSelector/data/fontrepo/fonts/'. However, adding a discrete
configuration variable makes it possible to configure ULS to use a custom URL
scheme that is more suitable for large static assets that change infrequently.

Change-Id: Idbe57072c4f3258757eb691e54cab5429cadcfda

UniversalLanguageSelector.php

@@ -137,6 +137,14 @@ $wgULSNoImeSelectors = array( '#wpCaptchaWord', '.ve-ce-documentNode' );
  */
 $wgULSNoWebfontsSelectors = array( '#p-lang li > a' );
 
+/**
+ * Base path of ULS font repository.
+ * If not set, will be set to 'UniversalLanguageSelector/data/fontrepo/fonts/',
+ * relative to $wgExtensionAssetsPath.
+ * @since 2013.10
+ */
+$wgULSFontRepositoryBasePath = false;
+
 // Internationalization
 $wgExtensionMessagesFiles['UniversalLanguageSelector'] =
 	__DIR__ . '/UniversalLanguageSelector.i18n.php';