Add instruction for download/install from git
Merge pull request #624 from Asenar/doc-add-git-installation

Add instruction for download/install from git
change argument type for ref parameter in Product loop. Fix #604
set thelia version to 2.0.3
Merge pull request #623 from lovenunu/hook

Add Hooks registering in module
Fix hook registration and smarty modulecode argument
	modifié:         core/lib/Thelia/Core/Template/Smarty/Plugins/Hook.php
	modifié:         core/lib/Thelia/Module/BaseModule.php