Update readme.

README.md

@@ -7,3 +7,32 @@ pre-commit-hooks
 Some out-of-the-box hooks for pre-commit.
 
 See also: https://github.com/pre-commit/pre-commit
+
+
+### Using pre-commit-hooks with pre-commit
+
+Add this to your `.pre-commit-config.yaml`
+
+    -   repo: git://github.com/pre-commit/pre-commit-hooks
+        sha: ''  # Use the sha you want to point at
+        hooks:
+        -   id: trailing-whitespace
+        # -   id: ...
+
+
+### Hooks available
+
+- `check-yaml` - Attempts to load all yaml files to verify syntax.
+- `debug-statements` - Check for pdb / ipdb / pudb statements in code.
+- `end-of-file-fixer` - Makes sure files end in a newline and only a newline.
+- `flake8` - Run flake8 on your python files
+- `name-tests-test` - Assert that files in tests/ end in _test.py
+- `pyflakes` - Run pyflakes on your python files
+- `trailing-whitespace` - Trims trailing whitespace.
+
+### As a standalone package
+
+If you'd like to use these hooks, they're also available as a standalone
+package.
+
+Simply `pip install pre-commit-hooks`