Merge pull request #16 from sanelson/v0.16_support

Fixed HEAD only pivy build limitation, now builds v0.5.0 by default

Author: sanelson

pivy.rb

@@ -3,6 +3,9 @@
 class Pivy < Formula
   homepage "https://bitbucket.org/Coin3D/pivy/overview"
   head "https://bitbucket.org/Coin3D/pivy", :using => :hg
+  url "https://bitbucket.org/Coin3D/pivy/get/tip.tar.gz"
+  sha256 "4b84e76470a97a4aad63ddfa4a7ce79fbb74029cdb0e0b86be2cd4248af35912"
+  version "0.5.0"
 
   depends_on :python
   depends_on "coin"