Merge pull request FriendsOfSymfony#345 from FriendsOfSymfony/fix/doc…

…umentation

fixed missing hyperlink

Merge pull request FriendsOfSymfony#341 from FriendsOfSymfony/2.0

added documentation due to packagist issues

Merge pull request FriendsOfSymfony#290 from FriendsOfSymfony/cs-fixes

Normalize coding style to the whole project

Merge pull request FriendsOfSymfony#162 from zocimek/master

fixed data transformer for null values

Add a note that the documentation is currently being rewritten.

Merge pull request FriendsOfSymfony#130 from toinouu/patch-1

Update validation.xml

Merge pull request FriendsOfSymfony#64 from zocimek/master

Multiple recipients support

Merge pull request FriendsOfSymfony#66 from gimler/patch-1

fix FriendsOfSymfony#62