complete german translation

- add german translation to all plugin dialogs
- add german translation of all template files
- add german translation to all themes
- add german language file to tinymce editor
- fix leanote import dialog on all languages in
plugins/import_leanote/plugin.js

public/plugins/langs/plugin.js

@@ -7,6 +7,9 @@ define(function() {
 			'en-us': {
 				'setLang': 'Langs',
 			},
+			'de-de': {
+				'setLang': 'Sprache',
+			},
 			'zh-cn': {
 				'setLang': '语言设置',
 			},