Add SharedBlock admin
Add translations
Refactor BlockAdmin classes
Shared blocks documentation
Update Install Doc
Merge pull request #431 from Th3Mouk/patch-1

Update Install Doc
Refactor BlockAdmin classes
Fix BlockAdmin and SharedBlockAdmin routing override
Add shared block block service to be able to use shared blocks
Update doc
Parametize admin class check
Update travis.yml
Merge pull request #429 from Wharenn/shared_blocks

Add shared blocks
Merge remote-tracking branch 'sonata-project/master'