Be more extensible.
Enhance the (inner-)open method.

  * fix a bug: it uses the output stream instead of the stream (which is
    wrong…),
  * Allow to disable to run the interpreter.
Add the computeFromString() method.
The <_ /> computes translations that contains XYL.
Replace `_` by `Xyl` in classname.

Except for `<_ />` that matches de `Common\Translate` class.
Format `composer.json`.
Happy new year \o/.