move archive library to core so we can properly depend on it

apps/files_archive/appinfo/app.php

@@ -6,12 +6,6 @@
  * See the COPYING-README file.
  */
 
-OC::$CLASSPATH['OC_Archive'] = 'apps/files_archive/lib/archive.php';
-OC::$CLASSPATH['Archive_Tar'] = '3rdparty/Archive/Tar.php';
-foreach(array('ZIP','TAR') as $type){
-	OC::$CLASSPATH['OC_Archive_'.$type] = 'apps/files_archive/lib/'.strtolower($type).'.php';
-}
-
 OC::$CLASSPATH['OC_Filestorage_Archive']='apps/files_archive/lib/storage.php';
 
 OC_Hook::connect('OC_Filesystem','get_mountpoint','OC_Filestorage_Archive','autoMount');

lib/archive/tar.php

@@ -6,6 +6,8 @@
  * See the COPYING-README file.
  */
 
+require_once '3rdparty/Archive/Tar.php';
+
 class OC_Archive_TAR extends OC_Archive{
 	const PLAIN=0;
 	const GZIP=1;