Remove jquery.i18n code that the ULS extension overrides

Instead of using the whole jquery.i18n code, use only required parts
that are not customized in MW ULS. For this define a new RL module
ext.uls.i18n.

Also refactor MW message store for jquery.i18n.

Change-Id: Idda9fe505428ade409d937314d7216ebb4232c36

lib/jquery.i18n/languages/hy.js

@@ -0,0 +1,25 @@
+/**
+ * Armenian (Հայերեն) language functions
+ */
+
+( function ( $ ) {
+	'use strict';
+
+	$.i18n.languages.hy = $.extend( {}, $.i18n.languages['default'], {
+		convertGrammar: function ( word, form ) {
+			if ( form === 'genitive' ) { // սեռական հոլով
+				if ( word.substr( -1 ) === 'ա' ) {
+					word = word.substr( 0, word.length - 1 ) + 'այի';
+				} else if ( word.substr( -1 ) === 'ո' ) {
+					word = word.substr( 0, word.length - 1 ) + 'ոյի';
+				} else if ( word.substr( -4 ) === 'գիրք' ) {
+					word = word.substr( 0, word.length - 4 ) + 'գրքի';
+				} else {
+					word = word + 'ի';
+				}
+			}
+
+			return word;
+		}
+	} );
+}( jQuery ) );