Update Ruby version to 2.0.0-p247

* Security fix release notes: http://www.ruby-lang.org/en/news/2013/06/27/ruby-2-0-0-p247-is-released/
* Also, Heroku is now running the same patchlevel. Maintains dev/prod parity

linux

@@ -84,12 +84,12 @@ fancy_echo "Installing rbenv-gem-rehash so the shell automatically picks up bina
 fancy_echo "Installing ruby-build, to install Rubies ..."
   successfully git clone git://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
 
-fancy_echo "Installing Ruby 2.0.0-p195 ..."
-  successfully rbenv install 2.0.0-p195
+fancy_echo "Installing Ruby 2.0.0-p247 ..."
+  successfully rbenv install 2.0.0-p247
 
-fancy_echo "Setting Ruby 2.0.0-p195 as global default Ruby ..."
-  successfully rbenv global 2.0.0-p195
-  successfully rbenv shell 2.0.0-p195
+fancy_echo "Setting Ruby 2.0.0-p247 as global default Ruby ..."
+  successfully rbenv global 2.0.0-p247
+  successfully rbenv shell 2.0.0-p247
 
 fancy_echo "Updating to latest Rubygems version ..."
   successfully gem update --system

mac

@@ -74,12 +74,12 @@ fancy_echo "Installing GNU Compiler Collection, a necessary prerequisite to inst
   successfully brew tap homebrew/dupes
   successfully brew install apple-gcc42
 
-fancy_echo "Installing Ruby 2.0.0-p195 ..."
-  CC=gcc-4.2 successfully rbenv install 2.0.0-p195
+fancy_echo "Installing Ruby 2.0.0-p247 ..."
+  CC=gcc-4.2 successfully rbenv install 2.0.0-p247
 
-fancy_echo "Setting Ruby 2.0.0-p195 as global default Ruby ..."
-  successfully rbenv global 2.0.0-p195
-  successfully rbenv shell 2.0.0-p195
+fancy_echo "Setting Ruby 2.0.0-p247 as global default Ruby ..."
+  successfully rbenv global 2.0.0-p247
+  successfully rbenv shell 2.0.0-p247
 
 fancy_echo "Updating to latest Rubygems version ..."
   successfully gem update --system