Elsa

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* Add the ``--host`` option to CLI.
It corresponds to ``flask run``'s ``--host`` option.
* When serving (with ``serve`` or ``freeze --serve``), Elsa now listens on
Flask's default address, ``127.0.0.1``. The server is not visible
externally.
Use ``--host=0.0.0.0`` to select the original, less secure behavior. (`67`_)

.. _67: https://github.com/pyvec/elsa/pull/67

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* Add ``--verbose`` option for the CLI. If used, it prints all frozen URLs
to standard error. Useful when freezing big projects on Travis CI. (`51`_)

.. _51: https://github.com/pyvec/elsa/pull/51

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* Add ``invoke_cli`` option for the ``cli`` function.
If set to ``False``, it only returns the cli for further extending. (`45`_)
* Don't remove the remote tracking branch when ``--no-push`` is used (fixes `41`_)
* Improve handling of ``FrozenFlaskWarning`` (`37`_)
* Add the ``--show-git-push-stderr`` option to make deploy more verbose,
this can help debug problems, but is potentially dangerous, hence the output
of ``git push`` is hidden by default. (`37`_)

.. _37: https://github.com/pyvec/elsa/pull/37
.. _41: https://github.com/pyvec/elsa/issues/41
.. _45: https://github.com/pyvec/elsa/pull/45

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* Only treat Frozen-Flask warnings as errors, not other warnings (`34`_)
* Add a ``--remote`` option for ``deploy`` to use a custom git remote
* Be consistent on local vs Travis CI deployment, always erase the history
of the ``gh-pages`` branch (actually fixes `14`_)

.. _14: https://github.com/pyvec/elsa/issues/14
.. _34: https://github.com/pyvec/elsa/pull/34

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* **Security:** Do not display the remote URL when pushing gh-pages branch.
If you used Elsa 0.1 or 0.1.1 on Travis CI, revoke your GitHub
token, it was probably leaked in the log. (`25`_)

.. _25: https://github.com/pyvec/elsa/issues/25

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* Fix a problem with Travis CI based deployment