Revert "Always log to stdout"

This reverts commit fa4515d8.

scripts/build.js

@@ -29,6 +29,8 @@ function afterBuild(options) {
     'binding.node');
 
   mkdir(path.dirname(install), function(err) {
+    log.stream = process.stderr;
+
     if (err && err.code !== 'EEXIST') {
       log.error('node-sass build', err.message);
       return;
@@ -46,6 +48,7 @@ function afterBuild(options) {
           return;
         }
 
+        log.stream = process.stdout;
         log.info('node-sass build', 'Installed to %s', install);
       });
     });
@@ -130,6 +133,7 @@ function installGitDependencies(options, cb) {
 function build(options) {
   installGitDependencies(options, function(err) {
     if (err) {
+      log.stream = process.stderr;
       log.error('node-sass build', err.message);
       process.exit(1);
     }
@@ -151,6 +155,8 @@ function build(options) {
         return;
       }
 
+      log.stream = process.stderr;
+
       if (errorCode === 127) {
         log.error('node-sass build', 'node-gyp not found!');
       } else {

scripts/install.js

@@ -112,6 +112,7 @@ function checkAndDownloadBinary() {
   try {
     mkdir.sync(path.dirname(binaryPath));
   } catch (err) {
+    log.stream = process.stderr;
     log.error('node-sass install', 'Unable to save binary to %s: %s', path.dirname(binaryPath), err);
     return;
   }
@@ -124,6 +125,7 @@ function checkAndDownloadBinary() {
 
   download(sass.getBinaryUrl(), binaryPath, function(err) {
     if (err) {
+      log.stream = process.stderr;
       log.error('node-sass install', err);
       return;
     }