Adapt for Rails 4
Register the promotion
Fix calculator registrator
Add spanish locale
Add select2 script for taxon select fields
Change taxon preference type to integer

Just to pass the id instead of name
Change promotion rule view

Add select taxon field
Extend helper for preference fields generation to pass data

In case of taxon apply select2 to the field
Add install generator for script
Add jquery.domchanged plugin

To catch when taxon select appears on the page.
See https://github.com/jproulx/jquery-domchanged-plugin
Enable jquery.domchanged
Add event to apply autocomplete for the promotion rule
Add documentation
Merge branch 'add_spree_2_1_functionality'