Update version to 0.4.1 for new package

Move cleaning the repository step to before the wheel is
generated.

To re-package without old versions of jupyter-matplotlib-X.X.X.tgz.

To address: #163

RELEASE.md

@@ -1,5 +1,8 @@
 - To release a new version of ipympl on PyPI:
 
+# nuke the  `dist` and `node_modules`
+git clean -fdx
+
 Update _version.py (set release version, remove 'dev')
 git add and git commit
 python setup.py sdist upload
@@ -11,8 +14,5 @@ git push
 git push --tags
 
 - To release a new version of jupyter-matplotlib on NPM:
-
-# nuke the  `dist` and `node_modules`
-git clean -fdx
 npm install
 npm publish

ipympl/_version.py

@@ -1,2 +1,2 @@
-version_info = (0, 4, 0)
+version_info = (0, 4, 1)
 __version__ = '.'.join(map(str, version_info))