Add new translation functions.inc.php

Translate subject of information mail.
Notification mails are sent on the default language.
No mail is sent to the author witch are not done actions

git-svn-id: http://piwigo.org/svn/trunk@1908 68402e56-0260-453c-a942-63ccdbb3a9ee

template/yoga/mail/text/html/admin/cat_group_info.tpl

@@ -3,5 +3,5 @@
 <p>{IMG_URL}</p>
 <p>{lang:hello}</p>
 <p><a href="{LINK}">{LINK}</a></p>
-<p>{CPL_CONTENT}</p>
+<p>{CPL_CONTENT}</p>
 </div>

template/yoga/mail/text/plain/admin/cat_group_info.tpl

@@ -0,0 +1,6 @@
+{lang:hello}
+
+{LINK}
+
+{CPL_CONTENT}
+