Merge pull request #1 from spatialos/update-readme-gdk-note

Update README to say GDK should be placed side-by-side

Author: paulbalaji

README.md

@@ -2,4 +2,28 @@
 
 This is a blank project that you can use to build your own game with the [SpatialOS GDK for Unity](https://github.com/spatialos/gdk-for-unity).
 
+To use the blank project, you need to lone the GDK for Unity repository alongside the Blank Project so that they sit side-by-side:
+
+```
+  <common_parent_directory>
+      ├── gdk-for-unity-blank-project
+      ├── gdk-for-unity
+```
+
+You can use scripts to automatically do this or follow manual instructions.
+
+##### Automatic set up
+From the root of the `gdk-for-unity-blank-project` repository:
+
+* If you are using Windows run: `powershell scripts/powershell/setup.ps1`
+* If you are using Mac run: `bash scripts/shell/setup.sh`
+
+##### Manual set up
+1. Clone the [GDK for Unity](https://github.com/spatialos/gdk-for-unity) repository alongside the Blank Project so that they sit side-by-side:
+   * SSH - `git clone [email protected]:spatialos/gdk-for-unity.git`
+   * HTTPS - `git clone https://github.com/spatialos/gdk-for-unity.git`
+2. Navigate to the `gdk-for-unity` directory and checkout the pinned version which you can find in the `gdk.pinned` file, in the root of the `gdk-for-unity-blank-project` directory.
+
+   * `git checkout <pinned_version>`
+
 &copy; 2018 Improbable