Set up releasing process to other places

[aguschin]

Register "mlem" at snap, choco, brew, conda, apt-get, yum and other indexes

We have release on PyPi. We definitely need conda-forge. DVC have number of other distribution channels, like .deb, .rpm, brew, etc. Investigate whether we need those and set them up.

[dberenbaum]

Is conda-forge still planned for release?

[aguschin]

No. I think we should do this after release.