Create git tags for releases

[mauvilsa]

I created a previous issue to ask about the release process and hopefully push to improve it, see #237. However, that issue was closed without answering the main points that I was asking. I create this new ticket to request git tags be created for all releases and also previous releases. I will create a pull request with a proposal to improve the release process to see if there is support for it.

Regarding previous releases it seems that most of them can be derived from the history of file kaldi/__version__.py. The version 0.1.3 that can be seen in https://anaconda.org/Pykaldi/pykaldi-cpu/files can't be derived from this file history. For the other versions can we please create the git tags. Would be running the following:

git tag v0.2.1 02ca551c10d2103092b82f7d839545d28a201219
git tag v0.2.0 55a0906064ab26c3777c80bdf6ca3638fdf7c57a
git tag v0.1.2 0ff6fb0ce01ca7ffb0ee3b65a137c2d138ec7da4
git tag v0.1.1 8a967eda768a388cd4ba9b357790a64643ec4f25
git tag v0.1.0 a54b1f0c0e4edd07d82a34b4299c36ddf040a54b
git tag v0.0.9 84fbeaa837a558b4648d4fb9354a52f2ee431486
git tag v0.0.8 964b3a58200d4e010d75b3c88c977e7fe9ccfadf
git tag v0.0.7 508be78835f33a7166437a1439599daabed21579
git tag v0.0.6 1e149d111f6834079fed7554cba2ebf2f572a690
git tag v0.0.5 87406467045bb545763c5630747097e3368fbf1c
git tag v0.0.4 c7e5f211344aa5ae8c69a394d495b6044322a740
git tag v0.0.3 4930293cce524e353ede99d19cfd2460ba7dd26f
git push --tags