Merge pull request #15 from marinacabrera/docs/git-submodules

docs: update README to include description of GSH tool and submodule cloning instructions

README.md

@@ -10,4 +10,15 @@ This is a monorepo which contains all of our open source tools.
 [`packages/upg`](https://github.com/gptlabs/tools/tree/master/packages/upg)
 
 Short for "universal program generator," UPG is a tool for creating and editing
-programs in any language generated with the help of GPT-3.
+programs in any language generated with the help of GPT-3.
+
+### 2. GSH
+
+[`packages/gsh`](https://github.com/gptlabs/tools/tree/master/packages/upg)
+
+A natural language terminal shell for using your machine conversationally.
+
+------
+## **Contributing**
+### Cloning this monorepo and all submodules locally:
+`git clone --recursive-submodules -j8 [email protected]:gptlabs/tools.git`