bump activemodel builder dependency to 3.2
bump arel to 2.2.3
import activesupport/core_ext/object/inclusion from 3-2-github
add bcrypt-ruby to Gemfile
remove 1.8 monkey patches that aren't valid anymore
fix activemodel tests
don't warn or be verbose
only test sqlite3
this doesn't exist in the old version of rack we're testing with
our old ActiveSupport doesn't support passing procs to assert_difference
Raise NameError instead of ArgumentError in ActiveSupport::Dependencies

ActiveSupport::Dependencies now raises NameError if it finds an existing
constant in load_missing_constant. This better reflects the nature of
the error which is usually caused by calling constantize on a nested constant.

Closes #1423

Conflicts:
	activesupport/CHANGELOG
work around ruby 2.0 respond_to? changes
fix xml tests
add pry-stack_explorer
more respond_to fixes