Added a README and an example

README.md

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+# golightmyroom
+A go library for controlling Philips Hue light(s) with bluetooth.
+
+My motivation for this project started with not being able to control my light with my laptop, but also that [Philips is now forcing users to make an account in order to use their purchased light(s)](https://www.reddit.com/r/homeassistant/comments/16oaozs/philips_hue_will_soon_force_users_to_create_a_hue/),
+so now I've gotten a bigger reason to make this!
+
+## Example
+An example can be found at [example.go](./example.go)
+
+## Contributing
+Currently, contributing is a bit difficult right now, since a lot the code for controlling a light is shared logic. I haven't gotten around to separating it yet.

example.go

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+package golightmyroom
+
+import (
+	"context"
+	"sync"
+)
+
+func main() {
+	lights, err := multipleLights("mac address 1", "mac address 2")
+	if err != nil {
+		panic(err)
+	}
+
+	runMultiple(lights, func(light Light) {
+		light.SetBrightness(0.5)
+		if temperatureControlled, ok := light.(TemperatureControl); ok {
+			temperatureControlled.SetTemperature(TemperatureWarmWhite)
+		}
+	})
+}
+
+func multipleLights(macAddresses ...string) (lights []Light, err error) {
+	for _, macAddress := range macAddresses {
+		var light Light
+		light, err = ConnectToBluetoothWithContext(macAddress, context.Background())
+		if err != nil {
+			return nil, err
+		}
+		lights = append(lights, light)
+	}
+	return lights, nil
+}
+
+func runMultiple(lights []Light, f func(light Light)) {
+	var wg sync.WaitGroup
+	for _, light := range lights {
+		wg.Add(1)
+
+		light := light
+		go func() {
+			f(light)
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+}