Update readme.

.pre-commit-config.yaml

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 5887105..042c623 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,5 +1,5 @@
 -   repo: git@github.com:pre-commit/pre-commit-hooks
-    sha: 7c003425b35fff516c0ee88f4040c8c208d474bd
+    sha: a751eb58f91d8fa70e8b87c9c95777c5a743a932
     hooks:
     -   id: trailing-whitespace
     -   id: end-of-file-fixer
@@ -8,7 +8,7 @@
     -   id: name-tests-test
     -   id: flake8
 -   repo: git@github.com:pre-commit/pre-commit
-    sha: 96174deac671b451ee2a3fbdc647ad9606415e15
+    sha: bcb1283267c0a041c77150a80a58f1bc2a3252d6
     hooks:
     -   id: validate_config
     -   id: validate_manifest

README.md

diff --git a/README.md b/README.md
index a58cc01..202d898 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,32 @@
 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`