added link to translation instructions

src/main/resources/i18n/en.properties

@@ -39,6 +39,7 @@ view.no_unread_items=has no unread items.
 
 settings.general=General
 settings.general.language=Language
+settings.general.language.contribute=Contribute with translations
 settings.general.show_unread=Show feeds and categories with no unread entries
 settings.general.social_buttons=Show social sharing buttons
 settings.general.scroll_marks=In expanded view, scrolling through entries mark them as read

src/main/resources/i18n/fr.properties

@@ -39,6 +39,7 @@ view.no_unread_items=n'a pas d'entrées non-lues.
 
 settings.general=Général
 settings.general.language=Langue
+settings.general.language.contribute=Contribuer aux traductions
 settings.general.show_unread=Afficher les flux et les catégories pour lesquels tout est déjà lu
 settings.general.social_buttons=Afficher les boutons de partage sur réseaux sociaux
 settings.general.scroll_marks=En mode de lecture étendu, marquer comme lu les éléments lorsque la fenêtre descend.

src/main/webapp/templates/settings.html

@@ -25,6 +25,11 @@
 									<select name="language" ng-model="settings.language" class="input-block-level" 
 										ng-options="id as label for (id,label) in ServerService.supportedLanguages" required>
 									</select>
+									<span class="help-block">
+										<a href="https://github.com/Athou/commafeed#translate-commafeed-into-your-language" target="_blank">
+											${settings.general.language.contribute}
+										</a>
+									</span>
 								</div>
 							</div>
 							<div class="control-group">