Preserve the previous Skyweb API
Preserve the previous Skyweb API

The way Skyweb is exported was changed, but the Skyweb documentation
still suggests using:

    Skyweb = require('skyweb');

This change reintroduces support for that usage while keeping the new
typescript usage:

    import Skyweb from '../skyweb';

ShyykoSerhiy/skyweb,d10n/skyweb