gif2png 2.5.10 (new formula)

Closes Homebrew/homebrew#41195.

Signed-off-by: Dominyk Tiller <dominyktiller@gmail.com>

Formula/gif2png.rb

@@ -0,0 +1,23 @@
+class Gif2png < Formula
+  desc "Convert GIFs to PNGs."
+  homepage "http://www.catb.org/~esr/gif2png/"
+  url "http://www.catb.org/~esr/gif2png/gif2png-2.5.10.tar.gz"
+  sha256 "3a593156f335c4ea6be68e37e09994461193f31872362de4b27ef6301492d5fd"
+
+  depends_on "libpng"
+
+  def install
+    # parallel install fails
+    # emailed bug report to upstream author on 2015-07-08
+    ENV.deparallelize
+
+    system "./configure", "--disable-dependency-tracking",
+                          "--disable-silent-rules",
+                          "--prefix=#{prefix}"
+    system "make", "install"
+  end
+
+  test do
+    pipe_output "#{bin}/gif2png -O", File.read(test_fixtures("test.gif"))
+  end
+end