basic specs for copying associations
use activerecord-tableless gem instead of own code for using tableless models in specs
more elegant way to specfify which stuff to copy and in what order
specs for order of copy association calls
make CopyModel#not_to_copy handle symbols as well
specs for attributes that are considered safe but should not be copied regardless

Conflicts:
	spec/lib/copy_model/copy_model_spec.rb