Description:
------------
As of 0.0.5, php_libevent.h still contains this line:

#define PHP_LIBEVENT_VERSION "0.0.4"

instead of this line:

#define PHP_LIBEVENT_VERSION "0.0.5"

which prevents it from being used as a dependency in projects via Composer 
because phpversion("libevent") returns '0.0.4' for the 0.0.5 build when projects 
do actually need 0.0.5.

Test script:
---------------
Run php composer.phar install with this in the current working directory and libevent 0.0.5 installed:

{
  "require": {
    "ext-libevent": "0.0.5"
  }
}

Expected result:
----------------
$ php composer.phar install
Loading composer repositories with package information
Installing dependencies
Nothing to install or update
Generating autoload files

Actual result:
--------------
$ php composer.phar install
Loading composer repositories with package information
Installing dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested PHP extension ext-libevent 0.0.5 has the wrong version 
(0.0.4) installed.