Update CURL installation instructions

Just notify people that it's going to write to the current folder. Otherwise they might forget and pollute their project directory like I did!

README.md

@@ -16,7 +16,8 @@ Simply clone down this reposity, install dependencies, and get started on your a
 The use of the [yarn](https://yarnpkg.com/) package manager is **strongly** recommended, as opposed to using `npm`.
 
 ```bash
-# copy template using curl
+# create a directory of your choice, and copy template using curl
+mkdir new-electron-webpack-project && cd new-electron-webpack-project
 curl -fsSL https://github.com/electron-userland/electron-webpack-quick-start/archive/master.tar.gz | tar -xz --strip-components 1
 
 # or copy template using git clone