Merge pull request #102 from mkoubik/master

README.md: fixed link to Doctrine ORM github
typo

[skip ci]
[readme] Updated index.md

Removed extension of deprecated IdentifiedEntity and added Acticle::$id column.
Updated index.md

Added Identifier trait description.
Updated index.md

Fixed Identifier namespace.
Updated IdentifierEntity.php

Added @deprecated description.
Removed deprecated function call
Merge pull request #107 from enumag/patch-9

Removed deprecated function call
Merge pull request #106 from klimesf/patch-2

IdentifierEntity.php: Added @deprecated description
Merge pull request #105 from klimesf/patch-1

Index.md: Fixed usage of deprecated IdentifiedEntity