Add Stow package

packages/stow.rb

+require 'package'
+
+class Stow < Package
+  description 'Manage installation of multiple softwares in the same directory tree'
+  homepage 'https://www.gnu.org/software/stow/'
+  version '2.2.2'
+  source_url 'https://ftp.gnu.org/gnu/stow/stow-2.2.2.tar.gz'
+  source_sha256 'e2f77649301b215b9adbc2f074523bedebad366812690b9dc94457af5cf273df'
+
+  depends_on 'buildessential' => :build
+  depends_on 'perl'
+
+  def self.build
+    system "./configure", "--prefix=#{CREW_PREFIX}"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end