Release Name: 1.3.2

Notes:
* Bug fix for Net::Ping::HTTP
* No more load path mangling
* Package refactoring


Changes:
* Doing a 'require "net/ping"' was not automatically loading the
  Net::Ping::WMI class on MS Windows. This has been fixed. Thanks go to
  Joseph M. for the spot. 
* Removed all $LOAD_PATH mangling for both the library and tests.
* Fixed a bug in the Net::Ping::HTTP class where a failed redirect did
  not set the @exception and @warning instance variables properly.
* The PingStatus struct returned by Net::Ping::WMI is now frozen.
* The test-unit library was switched from a runtime dependency to a
  development dependency.
* Added the :gem Rake task that builds a gem.
* Updated the :gem_install task to use the :gem task as a prerequisite.
* Updated the dependencies for MS Windows.
* The Rake test tasks are now more Rakish, e.g. test:tcp instead of test_tcp.
* Renamed example file names to avoid any potential confusion with actual
  test files.