Add vim and virtualenv files to gitignore

These reduces clutter reported by git during development.
diff --git a/.gitignore b/.gitignore
old mode 100755
new mode 100644
index c5771df..d518bf8
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,10 @@
 *.pyc
 *.orig
 *.egg-info
+*.sw[opq]
+
+/.Python
+/bin
+/include
+/lib
+/man