Install REE and 1.9.3 on Mountain Lion

ree_mountain_lion_tip

http://robots.thoughtbot.com/post/27985816073/the-hitchhikers-guide-to-riding-a-mountain-lion

REE
======
https://rvm.io/packages/iconv/
rvm pkg install iconv
export CPPFLAGS=-I/opt/X11/include
rvm reinstall ree --with-iconv-dir=$rvm_path/usr

gem uninstall nokogiri
gem install nokogiri -v '1.5.0' 

1.9.3
======
brew update
then install a newer version of libiconv

brew install libiconv
then link your new iconv libs:

brew link libiconv
then install your gem

gem install nokogiri -- --with-iconv-dir=/usr/local/Cellar/libiconv/1.XX

# replace mysql owner if need 
sudo chown -RL mysql:mysql /usr/local/mysql/data