Add setup instructions.

Author: chinmaygarde

README.md

@@ -2,3 +2,12 @@ Flutter Wayland
 ============
 
 A Flutter Embedder that talks to Wayland.
+
+Setup Instructions
+------------------
+
+* Install the following packages (on Debian Stretch): `weston`, `libwayland-dev`, `cmake` and `ninja`.
+* From the source root `mkdir build` and move into the directory.
+* `cmake -G Ninja ../`. This should check you development environment for required packages, download the Flutter engine artifacts and unpack the same in the build directory.
+* `ninja` to build the embedder.
+* Run the embedder using `./flutter_wayland`. Make sure `weston` is running.