# require 'yaml'
# 
# begin  
#   require 'psych'   
#   YAML::ENGINE.yamler = 'psych'
# rescue Exception
#   warn "can't load 'psych', the new YAML engine (probably the 'libyaml' is not installed), usng 'sych' a deprecated one, \
# there may be some problems with encoding."
# end