Bugfix: crashes when no config file detected

It was looking for a (nonexistent, obsolete) variable to check if
the "config" command is running. Now, it just looks at the
command-line options directly and does it.

config.js

@@ -80,7 +80,7 @@ let config = convict({
 userConfig = path.join(os.homedir(), '.config/seance.yaml')
 if (fs.existsSync(userConfig)) {
   config.loadFile(userConfig)
-} else if (!runSetup) {
+} else if (process.argv[2] != 'setup') {
   console.warn(
     'Warning: no config file detected! ' +
     'Please run `seance setup` to configure your system'
@@ -102,4 +102,3 @@ allConf = config.getProperties()
 allConf.validated = validated
 
 module.exports = allConf
-