Merge pull request #302 from sylvaindeloux/master

Added POST Block API controller
Updated parameter name
Merge pull request #303 from Bladrak/updatedContainer

Updated ContainerBlockService to take template list as parameter
Fixed typos
Merge pull request #304 from pborreli/typos

Fixed typos
Refactor and add missing units tests for page & blocks APIs
Merge pull request #306 from eko/api

Refactor and add missing units tests for page & blocks APIs
Add pages snapshots generation
Merge pull request #307 from eko/api

Add pages snapshots generation
Make serializer.xml available
Merge pull request #308 from eko/master

Make serializer.xml available
Added CONTRIBUTING.md file
Merge pull request #309 from Bladrak/contributing

Added CONTRIBUTING.md file
Adding breadcrumb twig helper usage documentation
Merge pull request #310 from ronanguilloux/patch-2

Adding breadcrumb twig helper usage documentation
Updated jQuery version
Init page composer
Add ability to remove child blocks from list + Add loader indicators
Apply select2 on ajax responses
Implement sortable container children blocks