Include sample in top level rake test and test_app
Update README for 2-3-stable
Bump to 2.3.0
[frontend] Make thank_you_for_your_order message much smaller

It's not a header, just a notice. It doesn't need to be as big as the order number.
Bump to Rails 4.1.2
Add basic Devise configuration to stop dummy app warning
Clear all CHANGELOGs
Bump to 2.4.0.beta
Fix typo in add_line_item_id_to_spree_inventory_units migration

Fixes a bug introduced in #4822
Add Jersey to the default list of countries

Fixes #4890
Deleted the continue button on the RMA index

Deleted the continue button on the RMA index.
It does not have any function there.
Fixes #4891
Lock jquery-rails to 3.1.0 as 3.1.1 breaks data-confirm. Fixes #4892
remove 2-3-stable gem dependencies

since spree got bumped to 2.4.0.beta

Fixes #4893
make incl/excl in ShippingRate#display_price translatable

Fixes #4894
make click_and_drag_on_the_products_to_sort_them in spree/admin/taxons/index translatable

Fixes #4894
Fix duplicate address records being created during the checkout process.

The bug happens when a user fills out their address details in the address step, continues to the delivery step, goes back to the address step, and continues to the delivery step again. When the user continues the checkout process the addresses are created as new records in the database rather than being updated. This is because the id parameter isn't permitted by the controller, without which the existing records cannot be updated, resulting in new records being created for every change to the order addresses.
adjustment_state (icon) returns 'fa fa-lock'

The adjustment_state helper returned `<span class="lock"></span>` which is not the correct html for an icon.

I edited the helper and it returns the right classname now.
So the icon is visible again.
New paradigm for customer refunds

Initial step in a larger piece of returns & exchanges improvements.

Major

* new "refunded" state for return authorizations
* separation of refunds from payments
  * add a new refund model
  * use "refunds" in place of negative payments
  * stop generating order adjustments when receiving return authorizations
      * we no longer need to create order adjustments in order to provide refunds
* updated admin ui
  * added a "refund" button in the return authorization flow
  * list refunds along with payments
  * add payment identifier column to payments list

Minor

* extra validation on `ReturnAuthorization#force_positive_amount`
* improve some existing specs by using real `ActiveMerchant::Billing::Response` objects instead of doubles

Generated by @jordan-brough & @richardnuno

Fixes #4883
Take adjustments into consideration when calculating RMA totals

* Added #total_per_item to line_item that calculates total per item including adjustments
* Added new column in the RMA admin screen to display the total per item for a variant
* Updated javascript that suggests the RMA total to use the total per item when calculating

Fixes #4895
Only destroy tax adjustment for open order when the associated tax rate is deleted. For closed order just nullify the source_id.

Update line_item & order when adjustments are deleted.

Add rspec tests to cover cases where adjustments get (or not get) destroyed when taxrate/promotion is deleted.

Move deals_with_adjustments to a separate mixin.

Add new mixin to core

Revert previous changes to remove unnecessary tests.

Remove order.update! and simplify rspec.

Fixes #4828
Fixes #4771

Conflicts:
	core/spec/models/spree/tax_rate_spec.rb