document versioning philosophy

[beriberikix]

I believe we are following semver so we should mention that somewhere and link to http://semver.org/

[ryanseys]

Are we going to provide versioned docs? At least for major & minor releases (not patch releases)

[silvolu]

That's the plan. Today I should have time to work on the build script.

[stephenplusplus]

We now have versioned docs 👍

I don't think it's necessary to make any specific mention of semver. It's implied since we're a node module and registered on npm. If that's not the popular opinion, feel free to re-open. Just trying to clean up the backlog :)