Transform into library

Signed-off-by: Thomas Klaehn <thomas.klaehn@perinet.io>

examples/parse.rs

@@ -0,0 +1,10 @@
+use gps_parser;
+
+fn main() {
+    let mut gps_parser = gps_parser::GpsParser::new("/dev/ttyACM0");
+    loop {
+        if let Ok(res) = gps_parser.parse_nmea() {
+            println!("{:?}",res);
+        }
+    }
+}