Java build update and add gradle wrapper.

gradle/homebrew-mpw.rb

@@ -0,0 +1,31 @@
+class Mpw < Formula
+  homepage "http://masterpasswordapp.com"
+  url "https://ssl.masterpasswordapp.com/mpw-2.1-cli4-0-gf6b2287.tar.gz"
+  sha1 "036b3d8f4bd6f0676ae16e7e9c3de65f6030874f"
+  version "2.1-cli4"
+
+  depends_on "automake" => :build
+  depends_on "autoconf" => :build
+  depends_on "openssl"
+
+  resource "libscrypt" do
+    url "http://masterpasswordapp.com/libscrypt-b12b554.tar.gz"
+    sha1 "ee871e0f93a786c4e3622561f34565337cfdb815"
+  end
+
+  def install
+    resource("libscrypt").stage buildpath/"lib/scrypt"
+    touch "lib/scrypt/.unpacked"
+
+    ENV["targets"] = "mpw mpw-tests"
+    system "./build"
+    system "./mpw-tests"
+
+    bin.install "mpw"
+  end
+
+  test do
+    assert_equal "Jejr5[RepuSosp",
+        shell_output("mpw -u 'Robert Lee Mitchell' -P 'banana colored duckling' masterpasswordapp.com").strip
+  end
+end