Add missing sql.Scanner/driver.Value interfaces to uuid.UUID

[aslakknutsen]

Copy implementation from satori/go.uuid/uuid.UUID

fixes #609

A bit crude fix, but works.. Better suggestion?

[raphael]

Thank you! I think we need to revisit how we approach the problem. Including all that code doesn't feel very satisfactory :). The basic problem @skritchz is trying to fix is to remove the use of uuid.UUID when the client code is written in gopherJS because the package uses constructs that don't work there. On the server side we should be able to just use the uuid package. So my recommendation would be to change the code generators to use the satori package directly on the server side.

[aslakknutsen]

Yea, the Goa uuid.UUID was introduced to remove the usage of the satori package.

Any tips on how to use the satori package and still make goperJS happy?

[raphael]

What I'm suggesting above is to use the satori package server side (app package) and only use the goa uuid package client side. GopherJS is only interested in client side and the postgress stuff is only relevant to server side. So the change would be to update the genapp generator to import the satori package instead of the goa UUID package. This should make what you need work and shouldn't affect GopherJS.

[aslakknutsen]

Reverted change of using satori/go.uuid in Client code.

[raphael]

Awesome PR, thank you!

[aslakknutsen]

You're welcome! :)