GAE can't access bootstrap folder

GAE can't access bootstrap folder

I'm a noob missing something very rudimentary. Taking the advice of
Senthil Kumaran here, I added the bootstrap folder to my app.yaml, but I
still can't reference the resources. My app.yaml looks like:
application: generacy
version: 1
runtime: python27
api_version: 1
threadsafe: true
handlers:
- url: /static
static_dir: static
- url: /.*
script: blog.app
- url: /bootstrap
static_dir: bootstrap
libraries:
- name: jinja2
version: latest
- name: PIL
version: "1.1.7"
and I'm referring to bootstrap js using this at the bottom:
<script src="bootstrap/assets/js/jquery.js"></script>
<script src="bootstrap/dist/js/bootstrap.min.js"></script>
<script src="bootstrap/assests/js/holder.js"></script>
but it doesn't work. However, if I put the files in my static folder, and
refer to them as:
<script src="static/jquery.js"></script>
<script src="static/bootstrap.min.js"></script>
<script src="static/holder.js"></script>
It does work.