added mongoid support to specs application_spec, belongs_to_spec, comments_spec, csv_builder_spec, order_clause_spec
removed unused mongoid files.
resource spec improved: added mongoid's find_by
tried to minimize Mongoid::Document monkeypatching
formtastic_addons and resource_extension fixed for mongoid
filter/formtastic_addons, helpers/collection, filters/forms fied
mongoid rails template: added devise temp fix
added mongoid support tofeatures/support/env
features/*/factoey_steps: added mongoid Post creation