Revert "Upgrade checkout to v1.1.0 to better support scripting git. (#56)"

This reverts commit 0b496e91ec.

README.md

@@ -1,22 +1,36 @@
 # checkout
 
-This action checks out your repository so that your workflow operates from the root of the repository
+This action checks out your repository to `$GITHUB_WORKSPACE`, so that your workflow can access the contents of your repository.
+
+By default, this is equivalent to running `git fetch` and `git checkout $GITHUB_SHA`, so that you'll always have your repo contents at the version that triggered the workflow.
+See [here](https://help.github.com/en/articles/events-that-trigger-workflows) to learn what `$GITHUB_SHA` is for different kinds of events.
 
 # Usage
 
 See [action.yml](action.yml)
 
 Basic:
+
 ```yaml
 steps:
 - uses: actions/checkout@master
 - uses: actions/setup-node@master
   with:
-    version: 10.x 
+    node-version: 10.x 
 - run: npm install
 - run: npm test
 ```
 
+By default, the branch or tag ref that triggered the workflow will be checked out. If you wish to check out a different branch, specify that using `with.ref`:
+
+```yaml
+- uses: actions/checkout@master
+  with:
+    ref: some-branch
+```
+
+For more details, see [Contexts and expression syntax for GitHub Actions](https://help.github.com/en/articles/contexts-and-expression-syntax-for-github-actions)
+
 # License
 
 The scripts and documentation in this project are released under the [MIT License](LICENSE)

action.yml

@@ -1,5 +1,5 @@
 name: 'Checkout'
-description: 'Checkout a Git repository'
+description: 'Checkout a Git repository.'
 inputs: 
   repository:
     description: 'Repository name'
@@ -11,7 +11,7 @@ inputs:
     description: 'If true, execute `execute git clean -ffdx && git reset --hard HEAD` before fetching'
     default: true
   submodules:
-    description: 'Directory containing files to upload'
+    description: 'Whether to include submodules: false to exclude submodules, true to include only one level of submodules, or recursive to recursively clone submodules; defaults to false'
   lfs:
     description: 'Whether to download Git-LFS files; defaults to false'
   fetch-depth:
@@ -19,4 +19,5 @@ inputs:
   path:
     description: 'Optional path to check out source code'  
 runs:
+  # Plugins live on the runner and are only available to a certain set of first party actions.
   plugin: 'checkout'