Log Message:
* Use lang/ruby/gem.mk instead of misc/rubygems/rubygem.mk.
* Update MASTER_SITES.
* Add LICENSE.
* Remove default value of GEM_BUILD.

== 3.4.1 (2005-11-20)
  * [CHANGE] do not apply *.rb filter for lib/**.
  * [CHANGE] updates "#!/usr/bin/env ruby" on --shebang=ruby (it is \ 
default).
  * [fix] --shebang option did not work.
  * [fix] --without-ext option did not work.
  * [fix] default --rubypath value should include file extension. (Thanks U.Nakamura)
  * [fix] task SHOW, SETUP, TEST, CLEAN, DISTCLEAN with any argument wrongly \ 
caused exception.