New language constants

references #274

(my first cherry-pick)

Conflicts:
	docs/NEWS

lang/serendipity_lang_ta.inc.php

@@ -1088,3 +1088,4 @@
 @define('PUBLISH_NOW', 'Publish this entry now (sets current time and date)');
 @define('EDITOR_TAGS', 'Tags');
 @define('EDITOR_NO_TAGS', 'No tags');
+@define('DASHBAORD_ENTRIES', 'In Progress');