automatically deploy built binaries on build server for tagged versions

[dhebbeker]

For each pushed version tag, the built binary file (which may be flashed to the device) shall be provided by the build server (as build artefact).

A version tag shall use the version name prefixed with a v as this is common practice. The rest of the tag string shall be according to SemVer.

Depends on:

• test for compile errors on build server #52