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/os.js

@@ -0,0 +1,75 @@
+/**
+ * Ossetian (Ирон) language functions
+ *
+ * @author Santhosh Thottingal
+ */
+
+( function ( $ ) {
+	'use strict';
+
+	$.i18n.languages.os = $.extend( {}, $.i18n.languages['default'], {
+		convertGrammar: function ( word, form ) {
+			// Ending for allative case
+			var endAllative = 'мæ';
+			// Variable for 'j' beetwen vowels
+			var jot = '';
+			// Variable for "-" for not Ossetic words
+			var hyphen = '';
+			// Variable for ending
+			var ending = '';
+			// Checking if the $word is in plural form
+			if ( word.match( /тæ$/i ) ) {
+				word = word.substring( 0, word.length - 1 );
+				endAllative = 'æм';
+			}
+			// Works if word is in singular form.
+			// Checking if word ends on one of the vowels: е, ё, и, о, ы, э, ю,
+			// я.
+			else if ( word.match( /[аæеёиоыэюя]$/i ) ) {
+				jot = 'й';
+			}
+			// Checking if word ends on 'у'. 'У' can be either consonant 'W' or
+			// vowel 'U' in cyrillic Ossetic.
+			// Examples: {{grammar:genitive|аунеу}} = аунеуы,
+			// {{grammar:genitive|лæппу}} = лæппуйы.
+			else if ( word.match( /у$/i ) ) {
+				if ( !word.substring( word.length - 2, word.length - 1 )
+						.match( /[аæеёиоыэюя]$/i ) ) {
+					jot = 'й';
+				}
+			} else if ( !word.match( /[бвгджзйклмнопрстфхцчшщьъ]$/i ) ) {
+				hyphen = '-';
+			}
+
+			switch ( form ) {
+			case 'genitive':
+				ending = hyphen + jot + 'ы';
+				break;
+			case 'dative':
+				ending = hyphen + jot + 'æн';
+				break;
+			case 'allative':
+				ending = hyphen + endAllative;
+				break;
+			case 'ablative':
+				if ( jot === 'й' ) {
+					ending = hyphen + jot + 'æ';
+				} else {
+					ending = hyphen + jot + 'æй';
+				}
+				break;
+			case 'superessive':
+				ending = hyphen + jot + 'ыл';
+				break;
+			case 'equative':
+				ending = hyphen + jot + 'ау';
+				break;
+			case 'comitative':
+				ending = hyphen + 'имæ';
+				break;
+			}
+
+			return word + ending;
+		}
+	} );
+}( jQuery ) );