strict mode

Should fix usage with bundles including bunyan and using strict mode.
Had to fix a surprise effect that 'window === this' is no longer
true in strict mode:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode
"""That means, among other things, that in browsers it's no longer
possible to reference the window object through this inside a strict
mode function."""

Fixes #236, #231, and #223.

AUTHORS

@@ -23,3 +23,5 @@ Martin Gausby (https://github.com/gausby)
 Stéphan Kochen (https://github.com/stephank)
 Shakeel Mohamed (https://github.com/shakeelmohamed)
 Denis Izmaylov (https://github.com/DenisIzmaylov)
+Guillermo Grau Panea (https://github.com/guigrpa)
+Mark LeMerise (https://github.com/MarkLeMerise)

CHANGES.md

@@ -8,6 +8,7 @@ Known issues:
 
 ## bunyan 1.5.0 (not yet released)
 
+- [pull #236, issue #231, issue #223] Fix strict mode in the browser.
 - [pull #282, issue #213] Fixes bunyan to work with webpack. By Denis Izmaylov.
 - [pull #294] Update to dtrace-provider 0.6 to fix with node 4.0 and io.js 3.0.
 - Dropped support for 0.8 (can't install deps easily anymore for running

lib/bunyan.js

@@ -8,6 +8,8 @@
  * vim: expandtab:ts=4:sw=4
  */
 
+'use strict';
+
 var VERSION = '1.5.0';
 
 // Bunyan log format version. This becomes the 'v' field on all log records.
@@ -67,7 +69,7 @@ try {
 
 // Are we in the browser (e.g. running via browserify)?
 var isBrowser = function () {
-        return typeof (window) !== 'undefined' && this === window; }();
+        return typeof (window) !== 'undefined'; }();
 
 try {
     /* Use `+ ''` to hide this import from browserify. */
@@ -1095,12 +1097,11 @@ function safeCycles() {
 }
 
 
-/**
- * XXX
- */
+
+var RotatingFileStream = null;
 if (mv) {
 
-function RotatingFileStream(options) {
+RotatingFileStream = function RotatingFileStream(options) {
     this.path = options.path;
     this.stream = fs.createWriteStream(this.path,
         {flags: 'a', encoding: 'utf8'});