add complete german translation

- modify app/views/home/header.html to know de-de messages folder
- create messages/de-de folder with all german language files (album, blog, ...)
- create public/js/i18n/blog.de-de.js and ms.de-de.js files
- add public/tinymce/langs/de-de.js from tinymce project

Thanks to Marc Manthey (macbroadcast) who is the original author of the german translation for the leanote 1.x project (https://github.com/macbroadcast/leanote). I took his work as starting point for my complete german translation on leanote 2.0.

app/views/home/header.html

@@ -37,6 +37,7 @@ function log(o) {
 		<div id="navbar" class="navbar-collapse collapse">
 			<div id="lang">
 				<a data-lang="en-us">English</a>
+				<a data-lang="de-de">Deutsch</a>
 				<a data-lang="fr-fr">Français</a>
 				<a data-lang="zh-cn">简体中文</a>
 				<a data-lang="zh-hk">繁体中文</a>
@@ -111,4 +112,4 @@ function log(o) {
 		</ul>
 	</div>
 </div>
--->
+-->