Add ed-1.14.2

packages/ed.rb

+require 'package'
+
+class Ed < Package
+  version '1.14.2'
+  source_url 'http://ftpmirror.gnu.org/ed/ed-1.14.2.tar.lz'
+  source_sha1 '3e8aa331ffbc929884107ff3f8fbd76d01252277'
+
+  # only lz archive is available for ed and it requires lzip.
+  depends_on 'lzip'
+
+  def self.build
+    system "./configure"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+
+  def self.check
+    system "make", "check"
+  end
+end