move files into rails 3 location
bump up minor version given large change; regen spec
init no longer used
named_scope becomes scope in rails 3
make preferences an engine so it loads models in app/models
regen spec
actually fix init.rb warning
cleanup authors reference
Update lib/preferences.rb

Use class_attribute instead of class_inheritable_hash
Merge pull request #1 from partycarpet/rails3

Rails3