Some bug fixing for USVN

My team used to work with SVN internally, and using USVN as our admin tool. There are some bug found & get fixed during our deploying & using, such as,
 - missing rights control for subversion's tags folder
 - deprecated methods call in codes

Thanks a lot for your great works which make our SVN admin work much easier. :+1: 

BTW:  *Test.php autoloading was totally failed for current USVN, I might fixing it later. Thanks again!