implement nested attributes
fix error on 1.8.7
another 1.8.7 fix
change syntax to nests_many / nests_one; some refactoring
infer scope from association name and allow procs
allow to supply build_scope / find_scope
defaults for attributes
document defaults
allow defaults for nested attributes
fix bug with defaults computing several times; expand integration spec
update README for nested attributes
instance_eval the scope options
update README
bump version