add some documentation on how to use this

README.md

@@ -1,2 +1,30 @@
 # cordova-zebra-printer
 A Cordova plugin for Zebra printers for both iOS and Android with Ionic 3 bindings
+
+To use with Ionic 3
+
+Add the Ionic 3 bindings to your app.module.ts file
+```
+import { ZebraPrinter } from 'ca-cleversolutions-zebraprinter/native';
+...
+providers: [
+    ZebraPrinter,
+    ...
+```
+
+Then inject the ZebraPrinter into the constructor of the class where you wish to use it
+for example
+```
+constructor(public navCtrl: NavController, protected zebraPrinter:ZebraPrinter) {
+    console.log(">>>>>> Home Constructed <<<<<<<")
+  }
+
+  protected discover(){
+    console.log("Now Discover");
+    this.zebraPrinter.discover().then(result => {
+      console.log(result);
+    }).catch(err => {
+      console.error(err);
+    });
+  }
+```