Log Message:
Update to 0.25:

0.25 (2013/11/09)
* fix "insert" with directory argument
* optimize tab completion commands
* do character set conversion for tab completion commands
* require libmpdclient 2.3, MPD 0.16

0.24 (2013/10/29)
* configure.ac: fix syntax error
* new command "toggleoutput"
* use the "volume" command on MPD 0.18
* fix search/find with "filename" constraint
* add search/find with "base" constraint
* don't strip trailing slashes from absolute URLs