mark the develop version in the version string

VERSION

@@ -1 +1 @@
-3.5.1
+3.5.2-dev

boot.php

@@ -38,7 +38,7 @@ require_once('include/dbstructure.php');
 
 define ( 'FRIENDICA_PLATFORM',     'Friendica');
 define ( 'FRIENDICA_CODENAME',     'Asparagus');
-define ( 'FRIENDICA_VERSION',      '3.5.1' );
+define ( 'FRIENDICA_VERSION',      '3.5.2-dev' );
 define ( 'DFRN_PROTOCOL_VERSION',  '2.23'    );
 define ( 'DB_UPDATE_VERSION',      1215      );