Many Maps

This version updates Pretender to allow easier sharing of route maps.

The constructor can now take many maps:

import adminMaps from "testing/maps/admin";
import photoMaps from "testing/maps/photos";

var server = new Pretender(photoMaps, adminMaps);

The map instance method is also a public API for calling a map later:

The HTTP verb methods can also be called on an instance individually:

var server = new Pretender();

... some setup of stuff ...
import adminMaps from "testing/maps/admin";
var server = new Pretender();
... more setup ...

server.map(adminMaps);