add route_static_path flask util

this util is used for have a shorter route to a static path

e.g.
You have static path of 'myapp/static/some_static_project/' which you
want to expose in the route '/flowers, use:

route_static_path(app, '/flowers', 'some_static_project', 'flowers')

then, you can acess this file
'myapp/static/some_static_project/index.html' by going the url -
'flowers/index.html'.

This can be useful if you want to bring in a git submodule of a static frontend
project and expose it through a nice url.
add nature of code submodule
expose noc submodule through '/noc' route
add an index option to route_static_path

- if an index view function is passed it will be called on the bare
  route name with a list of all the html files under it