Add linux example

examples/linux.rs

@@ -0,0 +1,12 @@
+extern crate embedded_hal;
+extern crate linux_embedded_hal;
+extern crate ds323x;
+
+use linux_embedded_hal::I2cdev;
+use ds323x::Ds323x;
+
+fn main() {
+    let dev = I2cdev::new("/dev/i2c-1").unwrap();
+    let mut rtc = Ds323x::new_ds3231(dev);
+    println!("Seconds: {}", rtc.get_seconds().unwrap());
+}