Added testing page + started refactoring with RXJS

Author: destegabry

.gitignore

@@ -2,3 +2,4 @@ node_modules
 lib
 dist
 es
+.tmp

README.md

@@ -1,2 +1,13 @@
 # create-plugin-communication
 JS module providing discovery of the Arduino Create Plugin and communication with it
+
+## Development
+Just run `npm run dev` and open your browser on http://local.arduino.cc:8000
+
+## Agent communication
+
+To enable communication between your [local installation](http://local.arduino.cc:8000/) and the [Arduino Create Agent](https://github.com/arduino/arduino-create-agent)
+add `origins = http://local.arduino.cc:8000` on your agent config.ini file (if you are using https, add `origins = https://local.arduino.cc:8000`).
+
+- On macOs ~/Applications/ArduinoCreateAgent-1.1/ArduinoCreateAgent.app/Contents/MacOS/config.ini
+- On Linux ~/ArduinoCreateAgent-1.1/config.ini