CLI to install project (#164)

* CLI to install project

* CLI fixes

* Update README.md

* Cleanup gitignore

cli/__tests__/config.ts

@@ -0,0 +1,8 @@
+import { execShell } from '../src/config';
+
+export {};
+
+test('execShell runs a shell command', async () => {
+  let response = await execShell('echo "hello"');
+  expect(response).toEqual('hello\n');
+});