Add pygtk package

packages/pygtk.rb

+require 'package'
+
+class Pygtk < Package
+  description 'PyGTK is a Python package which provides bindings for GObject based libraries such as GTK+, GStreamer, WebKitGTK+, GLib, GIO and many more.'
+  homepage 'http://www.pygtk.org/'
+  version '2.24.0'
+  source_url 'https://ftp.gnome.org/pub/GNOME/sources/pygtk/2.24/pygtk-2.24.0.tar.bz2'
+  source_sha256 'cd1c1ea265bd63ff669e92a2d3c2a88eb26bcd9e5363e0f82c896e649f206912'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  depends_on 'libglade'
+  depends_on 'pygobject2'
+
+  def self.build
+    system "./configure --prefix=#{CREW_PREFIX} --libdir=#{CREW_LIB_PREFIX}"
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end