uninitialized constant DataShift::SpreeHelper::SpreeBaseLoader (NameError)

[drewdotpro]

In my Gemfile:
gem 'datashift', github: 'autotelik/datashift'
gem 'datashift_spree', github: 'autotelik/datashift_spree'

When running
bundle exec thor datashift_spree:load:attach_images --input=/vagrant/imageimport/import.xls

I receive the error:
/var/lib/gems/1.9.1/gems/datashift_spree-0.5.0/lib/loaders/spree/image_loader.rb:19:in <module:SpreeHelper>': uninitialized constant DataShift::SpreeHelper::SpreeBaseLoader (NameError) from /var/lib/gems/1.9.1/gems/datashift_spree-0.5.0/lib/loaders/spree/image_loader.rb:10:inmodule:DataShift'
from /var/lib/gems/1.9.1/gems/datashift_spree-0.5.0/lib/loaders/spree/image_loader.rb:8:in <top (required)>' from /var/lib/gems/1.9.1/gems/polyglot-0.3.5/lib/polyglot.rb:65:inrequire'
from /var/lib/gems/1.9.1/gems/polyglot-0.3.5/lib/polyglot.rb:65:in require' from /var/lib/gems/1.9.1/gems/datashift_spree-0.5.0/lib/thor/spree/products_images.thor:77:inattach_images'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/command.rb:27:in run' from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:126:ininvoke_command'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor.rb:359:in dispatch' from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/base.rb:440:instart'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/runner.rb:36:in method_missing' from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/command.rb:29:inrun'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/command.rb:126:in run' from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:126:ininvoke_command'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor.rb:359:in dispatch' from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/base.rb:440:instart'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/bin/thor:6:in <top (required)>' from /usr/local/bin/thor:23:inload'
from /usr/local/bin/thor:23:in `

'

[drewdotpro]

Pull request filed:
#34