Use STDOUT for logs from engine and auto searches

[shadowspawn]

Pull Request

Problem

Do not expect any output from this:

n --quiet --download engine >/dev/null

Issue: #653

Solution

The auto and engine related routines were logging to STDERR to allow returning function result on STDOUT. This made it awkward to suppress routine logging when running commands using target version of auto or engine.

Refactor to log to STDOUT and internally return function result in global.

ChangeLog

• consistently log to STDOUT