csv-fix 1.6

Closes Homebrew/homebrew#26842.

Formula/csv-fix.rb

@@ -1,13 +1,19 @@
-require 'formula'
+require "formula"
 
 class CsvFix < Formula
-  homepage 'http://code.google.com/p/csvfix/'
-  url 'https://bitbucket.org/neilb/csvfix/get/version-1.3.zip'
-  sha1 '2bca2d461434e7bd799e6c886d8eda769e7d3937'
+  homepage "http://code.google.com/p/csvfix/"
+  url "https://bitbucket.org/neilb/csvfix/get/version-1.6.tar.gz"
+  sha1 "ca770b47f2e08a09350c4005e6ab3c524798b440"
+
+  needs :cxx11
 
   def install
+    # clang on Mt. Lion will try to build against libstdc++,
+    # despite -std=gnu++0x
+    ENV.libcxx
+
     system "make lin"
-    bin.install 'csvfix/bin/csvfix'
+    bin.install "csvfix/bin/csvfix"
   end
 
   test do