Remove unused variable. Update README.

3 files changed, 9 insertions, 6 deletions

diff --git a/README.md b/README.md
index 51f8307..01da2c9 100644
--- a/README.md
+++ b/README.md
@@ -208,6 +208,8 @@ EntityX has the following build and runtime requirements:
 - [Glog](http://code.google.com/p/google-glog/) (tested with `0.3.2`).
 - [GTest](http://code.google.com/p/googletest/) (needed for testing only)
 
+**Note:** GTest is no longer installable directly through Homebrew. You can use [this formula](https://raw.github.com/mxcl/homebrew/2bf506e3d90254f81a669a0216f33b2f09589028/Library/Formula/gtest.rb) to install it manually.
+
 Once these dependencies are installed you should be able to build and install EntityX as follows. BUILD_TESTING is false by default.
 
 ```c++
diff --git a/entityx/Manager.h b/entityx/Manager.h
index cca3ff1..d5f8f1d 100644
--- a/entityx/Manager.h
+++ b/entityx/Manager.h
@@ -1,10 +1,10 @@
 /**
  * Copyright (C) 2012 Alec Thomas <alec@swapoff.org>
  * All rights reserved.
- * 
+ *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution.
- * 
+ *
  * Author: Alec Thomas <alec@swapoff.org>
  */
 
@@ -38,12 +38,14 @@ class Manager {
   /**
    * Initialize the entities and events in the world.
    *
-   * Typically used when 
+   * Typically used to create initial entities, setup event handlers, and so on.
    */
   virtual void initialize() = 0;
 
   /**
    * Update the world.
+   *
+   * Typically this is where you would call update() on all Systems in the world.
    */
   virtual void update(double dt) = 0;
 
diff --git a/entityx/System.h b/entityx/System.h
index c7da41d..f1803b1 100644
--- a/entityx/System.h
+++ b/entityx/System.h
@@ -1,10 +1,10 @@
 /**
  * Copyright (C) 2012 Alec Thomas <alec@swapoff.org>
  * All rights reserved.
- * 
+ *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution.
- * 
+ *
  * Author: Alec Thomas <alec@swapoff.org>
  */
 
@@ -48,7 +48,6 @@ class BaseSystem : boost::noncopyable {
   static Family family_counter_;
 
  protected:
-  boost::shared_ptr<EntityManager> entities;
 };