app: Removed add_web_components() method
app: Extracted create_http_app() function
app: Moved add_sqlalchemy() call into create_app() function
app: Added create_combined_app() function
app: Removed register_views() method
app: Moved /api route into separate app
views/errors: Split error handlers up, one for each app

This is no longer hardcoded to the /api/ path prefix
app: Moved SkyLines class and factory methods into app module