Add libechonest 1.1.5.

Formula/libechonest.rb

@@ -0,0 +1,16 @@
+require 'formula'
+
+class Libechonest < Formula
+  url 'http://pwsp.cleinias.com/libechonest-1.1.5.tar.bz2'
+  homepage 'https://projects.kde.org/projects/playground/libs/libechonest'
+  md5 'dfee05ea5dd58b320fce015bf5cb32e5'
+
+  depends_on 'cmake'
+  depends_on 'qt'
+  depends_on 'qjson'
+
+  def install
+    system "cmake . #{std_cmake_parameters}"
+    system "make install"
+  end
+end