Improve README based on my installation experience

README.md

@@ -1,7 +1,13 @@
-Package systray is a cross platfrom Go library to place an icon and menu in the notification area.
-Tested on Windows 8, Mac OSX, Ubuntu 14.10 and Debian 7.6.
+systray is a cross-platform Go library to place an icon and menu in the notification area.
+
+## Features
+
+* Supported on Windows, macOS, and Linux
+* Menu items can be checked and/or disabled
+* Methods may be called from any Goroutine
+
+## API
 
-## Usage
 ```go
 func main() {
 	// Should be called at the very beginning of main().
@@ -22,35 +28,45 @@ func onExit() {
 	// clean up here
 }
 ```
-Menu item can be checked and / or disabled. Methods except `Run()` can be invoked from any goroutine. See demo code under `example` folder.
 
-## Platform specific concerns
+## Try the example app!
+
+Have go v1.12+ or higher installed? Here's an example to get started on macOS:
+
+```sh
+git clone https://github.com/getlantern/systray
+env GO111MODULE=on go run systray/example/main.go
+```
+
+The following text will then appear on the console:
+
+
+```sh
+go: finding github.com/skratchdot/open-golang latest
+go: finding github.com/getlantern/systray latest
+go: finding github.com/getlantern/golog latest
+```
+
+Now look for *Awesome App* in your menu bar!
+
+![Awesome App screenshot](example/screenshot.png)
+
+## Platform notes
 
 ### Linux
 
+* Building apps requires the `gtk3` and `libappindicator3` development headers to be installed. For Debian or Ubuntu, you can may install these using:
+
 ```sh
 sudo apt-get install libgtk-3-dev libappindicator3-dev
 ```
-Checked menu item not implemented on Linux yet.
 
-## Try
+* Checked menu items are not yet implemented
 
-Under `example` folder.
-Place tray icon under `icon`, and use `make_icon.bat` or `make_icon.sh`, whichever suit for your os, to convert the icon to byte array.
-Your icon should be .ico file under Windows, whereas .ico, .jpg and .png is supported on other platform.
-
-```sh
-go get
-go run main.go
-```
-
-## Building and the Console Window
-
-By default, the binary created by `go build` will cause a console window to be opened on both Windows and macOS when run.
 
 ### Windows
 
-To prevent launching a console window when running on Windows, add these command-line build flags:
+* To avoid opening a console at application startup, use these compile flags:
 
 ```sh
 go build -ldflags -H=windowsgui