dispatching variant creation event
Remove final keyword in SyliusCheckoutEvents.

I want to extend and add more events.
Include promotion total to PayPal gateway.
Set shipment state to onhold before process payment.
fixed spec
Merge pull request #1060 from kayue/patch-5

Remove final keyword in SyliusCheckoutEvents.
Merge pull request #1063 from kayue/patch/order-shipping-state

Set shipment state to onhold before process payment.
Merge pull request #1059 from akovalyov/fix/generator-events

Proper dispatching of variant creation event
Merge pull request #1062 from kayue/patch-6

[BUG] Include promotion total to PayPal gateway.
Merge pull request #1069 from aRn0D/composer

Resource bundle depend on symfony form.
Testing must take place in the en-US locale since tests are written for it.
This solve the behat failures for checking promotional discounts (most locales
show negative number as: -$100.00,  en-US shows ($100.00)
Fixes #853 along with other issues.
Merge pull request #1014 from mykehsd/feature/I#853-NumberformatterTesting

Numberformatter intl bugs with negative numbers
The configuration directory can be overwrote easily.