adding StaticHandler and loading templates and static resources from current package
add default template and static data to be included in the pywb package
add test for custom static route
* proxy router for handling only proxy
* proxy/archival router for handling both archival and proxy mode,
togglable with 'enable_http_proxy' setting in config
* supports only most recent capture playback -- no support for
selecting replay date/calendar view yet
* not testable with WebTest -- need better way to unit test proxy mode