Various clean up

Files:
* Consistently have one (1) new line at EOF
  (.gitignore, *.css, *.sh)

JSHint:
* Separate the common (general Wikimedia code conventions) from
  the local more stricter rules (nice work!).

Maintenance:
* Use simplified $IP definition where getenv is only called once.
  Based on http://git.io/ve-mw-36fc3b59-makeStaticLoader

JavaScript:
* Use the same closure in all files:
  - No need for "undefined".
  - One linebreak between license header and start of closure
    (sometimes there were 1 or 2 empty lines).
  - ext.uls.ime.js: No need for "document" (redundant in general,
    but especially as it wasn't used anywhere in this file).
  - Use "$, mw" for all ext.* modules (one of them used "mw, $").

Change-Id: Iba5dab14bbc3fbfc9f8fe96dd2d95529587a69aa

data/LanguageNameIndexer.php

@@ -18,19 +18,16 @@
  * @licence MIT License
  */
 
-// Standard boilerplate to define $IP
-if ( getenv( 'MW_INSTALL_PATH' ) !== false ) {
-	$IP = getenv( 'MW_INSTALL_PATH' );
-} else {
-	$dir = __DIR__;
-	$IP = "$dir/../../..";
+$IP = getenv( 'MW_INSTALL_PATH' );
+if ( $IP === false ) {
+	$IP = __DIR__  . '/../../..';
 }
 require_once "$IP/maintenance/Maintenance.php";
 
 class LanguageNameIndexer extends Maintenance {
 	public function __construct() {
 		parent::__construct();
-		$this->addDescription( "Script to create language names index." );
+		$this->addDescription( 'Script to create language names index.' );
 	}
 
 	public function execute() {