update rails gem along with the simple_form gem to get it done
update decent_exposure to make test passing
run rake rails:update and adjust config
lock sprockets

to get rid of undefined method `environment' for nil:NilClass
config action mailer in a regular way
fix wrong order of requires
make spring working with spec
update rspec to the latest beta
Merge branch 'master' into rails_4_1

Conflicts:
	Gemfile
	spec/spec_helper.rb
remove email_spec because it's not ready for rspec 3 yet
update few gems
[gem] update bootstrap-sass
[gem] update coffee-rails
[gem] update uglifier
[gem] update rails_layout
[gem] update spring-commands-rspec
Merge pull request #36 from netguru/rails_4_1

upgrade Rails to the latest version (4.1) [stable]