Fugue migration boiler plate

[Anund McKague]

Here's the boiler plate you might write if you need to work between version 2 and version 3 of Fugue. (mostly?)

https://bitbucket.org/snippets/amckague/Xo5x5

I'd like to link to this in the readme if not produce a throw away maven artefact.

Suggestions on naming or changing the variance welcome.

[Jean-Baptiste Giraudeau]

I think I would prefer "fromV2" instead of "toV3".

[Anund McKague]

https://bitbucket.org/atlassian/fugue/wiki/Migration%202-3