Version bump to 0.25 (#65)

fixes complaints about trying to include
sdl2-sys 0.24 and 0.25 in the same project.

Cargo.toml

@@ -2,7 +2,7 @@
 name = "sdl2_mixer"
 description = "SDL2_mixer bindings for Rust"
 repository = "https://github.com/andelf/rust-sdl2_mixer"
-version = "0.24.0"
+version = "0.25.0"
 license = "MIT/Apache-2.0"
 authors = ["ShuYu Wang <andelf@gmail.com>"]
 keywords = ["SDL", "windowing", "graphics", "music", "sound"]
@@ -13,8 +13,8 @@ path = "src/sdl2_mixer/lib.rs"
 
 [dependencies]
 bitflags = "0.6.0"
-sdl2 = "0.24.0"
-sdl2-sys = "0.24.0"
+sdl2 = "0.25.0"
+sdl2-sys = "0.25.0"
 libc = "0.2"
 
 # [dependencies.sdl2]