Add initializer [skip ci]
Translations [skip ci]
Use engine config instead of initializer to add promotion rule [skip ci]
Add admin promo builder view [skip ci]
Setup sqlite adapter for jruby

Conflicts:
	Gemfile

Conflicts:
	Gemfile
Allow failures on jruby-20mode [skip ci]
Specify rbx-2 for travis
Test on jruby-21mode instead
Run travis against 2.1.x latest
README updates [skip ci]
Add TODO to README
Add screenshot [skip ci]
Preference should be integer, not decimal [skip ci]
Spree 2.3.x compatibility
Spree 2.4.x compatibility