Add mdp package

Mdp is a command-line based markdown presentation tool.

Tested as working on XE500C13-K01US.

packages/mdp.rb

+require 'package'
+
+class Mdp < Package
+  description 'A command-line based markdown presentation tool.'
+  homepage 'https://github.com/visit1985/mdp'
+  version '1.0.10'
+  source_url 'https://github.com/visit1985/mdp/archive/1.0.10.tar.gz'
+  source_sha256 '7384c1ba32bd8e4b11342570d2144165a60682499b4cb54e50c8eb3164cfabc5'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  depends_on 'ncurses'
+
+  def self.build
+    system "CPPFLAGS=-I#{CREW_PREFIX}/include/ncursesw make"
+  end
+
+  def self.install
+    system 'make', "DESTDIR=#{CREW_DEST_DIR}", 'install'
+  end
+end