Log Message:
* take maintainer ship.
* Add LICENSE.
* Adjust new ruby packages' framework.
* Command name is gem${RUBY_VER} == gem18 now and add ALTERNATIVES.
* Add comments to patches.
* Overhalt --install_root option.
* Avoid access HOME when --install_root is enabled.
* honor PKG_SYSCONFDIR.

Bump PKGREVISION.