I see that many people have PRs open, one more for good measure.
Update imports to use modern flask style for extensions.
Reference cachelib since werkzeug removed the contrib.
Code style fixes.
Remove GAEMemcache since cachelib does not support it.
(Might add it to cachelib, might not I don't use it.
Is it really different than normal memcached?)
I see that many people have PRs open, one more for good measure.