Make use of user config multiplatform

[c33s]

using eval and os detection is quite uncool

        if (false === $this->isWindows()) {
            $local_config_file = exec('eval echo ~/.grav/config');
            if (file_exists($local_config_file)) {
                $this->local_config = Yaml::parse($local_config_file);
                $this->output->writeln('Read local config from <cyan>' . $local_config_file . '</cyan>');
            }
        }

the home directory can be read from a php server variable $_SERVER[HOME] so such an ugly hack would not be necessary.

[flaviocopes]

Good catch. Made a PR to fix this, glad if you can test it on Windows, as I don't have a Win machine at hand now.

[flaviocopes]

PR merged