Merge with upstream, increment version to 0.3.0 for breaking changes to audio_format module.

Author: mitchmindtree

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "coreaudio-rs"
-version = "0.2.1"
+version = "0.3.0"
 authors = ["mitchmindtree <mitchell.nordine@gmail.com>", "yupferris <jake@fusetools.com>"]
 description = "A friendly rust interface for Apple's CoreAudio API."
 keywords = ["core", "audio", "unit", "osx", "ios"]
@@ -16,5 +16,5 @@ num = "0.1.27"
 
 [dependencies]
 bitflags = "0.3.2"
-coreaudio-sys = "0.1.1"
-libc = "0.1.10"
+coreaudio-sys = "0.1.2"
+libc = "0.2.1"