Sinatra plugin that allows to easily prefix all routes within a scope. Basicall porting back the map functionality from Ramaze

How to get started:

```ruby require ‘sinatra/base’ require ‘sinatra/mapper’

module MyApp < Sinatra::Base register Sinatra::Mapper

map '/api/1.0'

get '/foo'
    "Bar #{request.path_info}"
end end ```

With such an application going to /api/1.0/foo should display “Bar /api/1.0/foo”