commit-msg stage does not work
Everything works as expected when running just `pre-commit install`, then hooks work.
But when running `pre-commit install -t commit-msg` `IOError` happens, since template could not be found.

Here's the detailed information.

## Env

- `python2.7`
- `pipenv 7.3.7`
- `pre-commit 1.1.1`

Actually tested with both `python2` and `python3`.

## Configuration

```yaml
- repo: local
  hooks:
    - id: gitlint
      name: gitlint
      entry: "bash -c 'gitlint lint'"
      language: system
      stages: [commit-msg]

    - id: pytest
      name: pytest
      entry: "bash -c 'python manage.py test'"
      language: system

    - id: safety
      name: safety
      entry: "bash -c 'safety check'"
      language: system
```

## Output

```
» pre-commit install -t commit-msg
Running in migration mode with existing hooks at /Users/sobolev/Desktop/test/.git/hooks/commit-msg.legacy
Use -f to use only pre-commit.
An unexpected error has occurred: IOError: [Errno 2] No such file or directory: '/Users/sobolev/.virtualenvs/test-p4WySO70/lib/python2.7/site-packages/pre_commit/resources/commit-msg-tmpl'
Check the log at /Users/sobolev/.cache/pre-commit/pre-commit.log
```

When I do `ls /Users/sobolev/.virtualenvs/test-p4WySO70/lib/python2.7/site-packages/pre_commit/resources/commit-msg-tmpl`  that's what is see:

```
(test-p4WySO70) ~/Desktop/test  master ✗                                  ✚ 2 ⚡
» ls /Users/sobolev/.virtualenvs/test-p4WySO70/lib/python2.7/site-packages/pre_commit/resources                
empty_template  pre-push-tmpl  ruby-build.tar.gz
hook-tmpl       rbenv.tar.gz   ruby-download.tar.gz
```
diff --git a/setup.py b/setup.py
index a2cd138..55116ca 100644
--- a/setup.py
+++ b/setup.py
@@ -29,11 +29,7 @@ setup(
     packages=find_packages(exclude=('tests*', 'testing*')),
     package_data={
         'pre_commit': [
-            'resources/hook-tmpl',
-            'resources/pre-push-tmpl',
-            'resources/rbenv.tar.gz',
-            'resources/ruby-build.tar.gz',
-            'resources/ruby-download.tar.gz',
+            'resources/*',
             'resources/empty_template/*',
             'resources/empty_template/.npmignore',
         ],
['setup.py']