Silenced build script io/path warnings

Author: mitchmindtree

.gitignore

@@ -26,4 +26,5 @@ watch.sh
 /examples/**
 !/examples/*.rs
 !/examples/assets/
-.portaudio
+.portaudio
+Cargo.lock

build.rs

@@ -18,7 +18,7 @@
 // COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-#![feature(io, env, path, fs, os)]
+#![feature(old_io, old_path, env, path, fs, os)]
 
 extern crate "pkg-config" as pkg_config;
 

examples/main.rs

@@ -1,4 +1,3 @@
-#![allow(unreachable_code, unused_assignments)]
 #![feature(core)]
 
 extern crate portaudio;
@@ -9,7 +8,7 @@ use std::error::Error;
 const SAMPLE_RATE: f64 = 44_100.0;
 const FRAMES: u32 = 256;
 
-fn main() -> () {
+fn main() {
 
     println!("PortAudio version : {}", pa::get_version());
     println!("PortAudio version text : {}", pa::get_version_text());