Added missing interpunction.

Conflicts:
	README.md
Improving PSR-2 compliance.

Conflicts:
	Encryptors/AES256Encryptor.php
	Subscribers/DoctrineEncryptSubscriber.php
Organising use statements.

Conflicts:
	Subscribers/DoctrineEncryptSubscriber.php
Encryptors are not created by a factory, but by the implementor.

Conflicts:
	Encryptors/EncryptorInterface.php
	Subscribers/DoctrineEncryptSubscriber.php
If Doctrine can work with non-public properties, so can we.
It makes no sense to access properties through methods, as we need to work with the raw values.