update .gitignore to include files in /static directory.

I've moved/changed how I was using the /static directory (site-wide
snippet) so I can start adding in images and what have you again. I
didn't realise I had set Git to ignore the how /static directory.

.gitignore

@@ -17,7 +17,4 @@
 *.wx32fsl
 *.db
 /bin/
-/storage/
-/static/images/
-/static/site-wide-snippet
-/static/js/site-wide-snippet.js
+/storage/