New formula: simple-tiles

Closes Homebrew/homebrew#18187.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/simple-tiles.rb

@@ -0,0 +1,19 @@
+require 'formula'
+
+class SimpleTiles < Formula
+  homepage 'http://propublica.github.com/simple-tiles/'
+  url 'https://github.com/propublica/simple-tiles/archive/0.3.0.tar.gz'
+  sha1 'c0c677b3b212457abc6a39ced4ee3e767be8e885'
+
+  head 'https://github.com/propublica/simple-tiles.git'
+
+  depends_on "pkg-config" => :build
+  depends_on "cairo"
+  depends_on "gdal"
+  depends_on "pango"
+
+  def install
+    system "./configure", "--prefix=#{prefix}"
+    system "make install"
+  end
+end