Check if order state is payment to accept payments

Redirect to payments/new when order has no payment
Also remove Continue bottom from orders/payments page,

[Fixes #2996]
[Fixes #2995]
[Fixes #2997]
Skip Deleted Stock Items in Stock Management Screen
pretty time should use capital M for month; fixes #3018
Add a few comment translations.
Fix shipping method sample data
- 9442383 required shipping methods to have at least one shipping
  category assigned
Start the installation instructions for people.

[Fixes #3007]
Removed localeapp dependency.

We can still use the gem to push translations to localeapp.com by installing it independently of spree.  Localeapp seemed to be causing issues with `rake test_app` as well so we're going to remove it.

[Fixes #3024]
Ignore localeapp API keys, etc.
Remove localeapp stuff
Minor updates to en.yml
Product page title test [Fixes #3027]
Fix stock transfer translations

[Fixes #3030]
Delegate Spree.t to Rails TranslationHelper

This way we get all the nice features Rails t() helper offers, mainly
displaying reasonable strings for missing translations.

At this point core test suite should be all green. I've remove a couple
i18n specs which were translating to :en locale. I don't think that make
sense since :en is the default locale. Other translations specs pass now

[Fixed #3023]
Fix scss import.

[Fixes #2932]
Put variables back where it was.

[Fixes #2422]
add the template file for generating the .rspec file. this was causing
"Could not find "rspec" in any of your source paths. Your current source
paths are: " [Fixes #3031]
Add request spec for backend new order process [Fixes #3022]

Fix order details and shipping method request specs

[Fixes #3000]
[Fixes #3032] When OrderInventory#verify is given a specific shipment, only remove variant from that shipment
Early pass at splitting a stock item across shipments

Conflicts:
	backend/app/views/spree/admin/orders/_shipment.html.erb
Allow stock movment action to be mass-assigned