[InstallerBundle] Fixing translations format to be consistent with other bundles.
Cleaning translations
[payum][paypal] add suppor of instant notifactions.
fix comments.
Bugfix InventoryHandler to remove units of items that have been removed from the cart.

Currently the inventory handler only adjusts the units of items that are still in the cart,
but when an item is removed from the cart, the inventory unit remains. This PR fixes this.
Take into account multiple items with same variant.
POC of CMF block bundle integration
Added a check for null values, they need to be set to IS null, not equals null
Reverting a change that broke the tests.
Merge pull request #845 from isometriks/master

[ResourceBundle] Proper handling of null values
Add other CMF bundles and sample page
PHPCR support for ResourceBundle
Refactoring code to make it easier to follow.
Add basic interface for editing the PHPCR content
Allowing translations to be uploaded to Crowdin
Add translations
Tweak fixtures
Merge pull request #830 from jjanvier/fix/installer-translations-format

[InstallerBundle] Fixing translations extension to be consistent with other...
Merge pull request #846 from jjanvier/fix/crowdin-integration

Allowing translations to be uploaded to Crowdin
Add more sample content