Remove dynamic routes until we figure out how to do proper queries

[treeder]

We can't have this: https://github.com/iron-io/functions/blob/master/api/server/runner.go#L92
An app could have thousands of routes, we only want to query what's required.

See #77 for discussion on how to solve this problem.

[treeder]

Current docs in README for reference:

Adding a route with URL params

You can create a route with dynamic URL parameters that will be available inside your function by prefixing path segments with a :, for example:

$ curl -H "Content-Type: application/json" -X POST -d '{
     "route": {
         "path":"/comments/:author_id/:num_page",
         "image":"IMAGE_NAME"
     }
}' http://localhost:8080/v1/apps/myapp/routes

:author_id and :num_page in the path will be passed into your function as PARAM_AUTHOR_ID and PARAM_NUM_PAGE.

See the Blog Example.