OS/Environment

None yet, but I'm working on OS X v10.11.6 'El Capitan' client-side. (See 'The way of deployment (cloud or local)' below for details on considered server infrastructure.)

Ansible version

None yet, as I haven't yet gotten that far into setting up Algo.

Version of components from requirements.txt

Not applicable (see above.)

Summary of the pro

Right now in different places in the SE codebase there are references to /opt and then as well to /usr.

All SE code should reference one place only. Could someone please create a PR that fixes this.

This PR should also take PR #454 into consideration (no conflicts)

consider using https://upx.github.io/ (or something else) for binary compression

Should be done after #43