Add the Ol Chiki script (Olck), add getLanguages(), and fix the tests

The tests were using languageData.languages, which was undefined.
This patch adds a method to get all the languages to be able to test.

index.js

@@ -24,6 +24,14 @@ function isRedirect( language ) {
 	return ( isKnown( language ) && languageData.languages[ language ].length === 1 ) ? languageData.languages[ language ][ 0 ] : false;
 }
 
+/**
+ * Get all the languages
+ * @return {Object}
+ */
+function getLanguages() {
+	return languageData.languages;
+}
+
 /**
  * Returns the script of the language.
  * @param {string} language Language code
@@ -278,6 +286,7 @@ module.exports = {
 	getAutonyms,
 	getDir,
 	getGroupOfScript,
+	getLanguages,
 	getLanguagesByScriptGroup,
 	getLanguagesByScriptGroupInRegion,
 	getLanguagesByScriptGroupInRegions,