Add instructions for generating .zip

readme.md

@@ -3,3 +3,20 @@
 [GravityView](https://gravityview.co/?utm_source=github&utm_medium=readme&utm_campaign=readme) is a commercial plugin available from [https://gravityview.co](http://gravityview.co). The plugin is hosted here on a public Github repository in order to better faciliate community contributions from developers and users. If you have a suggestion, a bug report, or a patch for an issue, feel free to submit it here. 
 
 If you are using the plugin on a live site, please purchase a valid license from the [website](https://gravityview.co/?utm_source=github&utm_medium=readme&utm_campaign=readme). We cannot provide support to anyone that does not hold a valid license key.
+
+----------
+
+### Installing GravityView from Github
+
+The plugin includes Git submodules that need to be included in the download for the plugin to be functional. In order to create a proper `.zip` file:
+
+1. Clone the GravityView repo on your computer using the Github app
+2. Install the [git-archive-all](https://github.com/Kentzo/git-archive-all) script
+3. Use the following command in the Terminal:
+
+```
+cd /path/to/gravityview/
+python /usr/bin/git-archive-all ../gravityview.zip
+```
+
+This will create a `gravityview.zip` file in the directory above the cloned GravityView plugin on your computer, which includes the submodules.