* Add WithAmp to enable AMP support for
pages instead of .amp.js

* Update handling for exporting AMP

* Fix ampPath in export for / path and
revert isAmp logic to handle right

* Update amphtml test suite

* Add handling for noDirtyAmp during
export and update amp-export test suite

* Update serverless and export-default-map
test suites

* Update require-page tests