Get lidar to a working state, add errors, example.

Sources/Examples/main.swift

@@ -0,0 +1,30 @@
+import SwiftRPLidar
+import SwiftSerial
+
+do {
+    try main()
+}
+catch {
+    print("Unexpected Error \(error)")
+}
+
+func main() throws {
+    let serialPort = SerialPort(path: "/dev/cu.usbserial-0001")
+    let lidar = try SwiftRPLidar(onPort: serialPort)
+    
+    try lidar.iterMeasurements { measurement in
+        print("Quality: ",measurement.quality, ", Angle: ", measurement.angle, ", Distance: ", measurement.distance)
+        return true
+    }
+}
+
+extension SerialPort: LidarSerial{
+    public func setBaudrate(baudrate: Int) {
+        // TODO: handle different baudrates. Only need this for now.
+        switch baudrate{
+        default:
+            setSettings(receiveRate: .baud115200, transmitRate: .baud115200, minimumBytesToRead: 3, timeout: 1)
+        }
+        
+    }
+}