Begin Semantic versioning

[Rebecca Jones]

#46 brings up a good point. Distros need to be able to package us consistently. Semantic Versioning would help.

Debian knows us at 0.3.1.

I suggest we start at 0.4.

[Artur K.]

Well, I've tagged a release as v0.3.99-alpha I hope we can get a few more bugs fixed before v0.4.0
I tentatively marked release date of v0.4.0 release as 25th of April

[Rebecca Jones]

Noted. Thanks.