Merge pull request BedrockStreaming#31 from M6Web/feature/static

Rollback about $data arrays : they are now static.

README.md

@@ -87,7 +87,10 @@ $factory     = new \M6Web\Component\RedisMock\RedisMockFactory();
 $myRedisMock = $factory->getAdapter('My\Redis\Library');
 ```
 
-**WARNING !** *RedisMock doesn't implement all Redis features and commands. The mock can have undesired behavior if your parent class uses unsupported features.*
+**WARNING !**
+
+  * *RedisMock doesn't implement all Redis features and commands. The mock can have undesired behavior if your parent class uses unsupported features.*
+  * *Storage is static and therefore shared by all instances.*
 
 *Note : the factory will throw an exception by default if your parent class implements unsupported commands. If you want even so partially use the mock, you can specify the second parameter when you build it `$factory->getAdapter('My\Redis\Library', true)`. The exception will then thrown only when the command is called.*