Auto-commit version number when bumped.
diff --git a/bump-version b/bump-version
index a5be835..60eac0d 100755
--- a/bump-version
+++ b/bump-version
@@ -9,3 +9,5 @@
 fi
 
 echo "GITFLOW_VERSION=$1" > gitflow-version
+git add gitflow-version
+git commit -m "Bumped version number to $1" gitflow-version