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.
[auto] Merge from Xyl

    • #258fb8e — Be more extensible. (Ivan Enderlin, 2013-11-20)
    • #f41e27b — Enhance the (inner-)open method. (Ivan Enderlin, 2013-11-20)
    • #88a1487 — Add the computeFromString() method. (Ivan Enderlin, 2013-11-20)
    • #5c6a1ea — The <_ /> computes translations that contains XYL. (Ivan Enderlin, 2013-11-20)

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Merge remote branch 'library-xyl/master'