fix: revert 'inherit' on stdin

Fixes #894
Fixes #895

I'll have to continue investigation as to how we deal with spawned clients setting raw on stdin. Will break #890 and FormidableLabs/webpack-dashboard#16

lib/monitor/run.js

@@ -37,7 +37,7 @@ function run(options) {
   var stdio = ['pipe', 'pipe', 'pipe'];
 
   if (config.options.stdout) {
-    stdio = [process.send || config.required ? 'pipe' : 'inherit',
+    stdio = ['pipe',
              process.stdout,
              process.stderr,];
   }