Scriptabit

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* Fixed issue 45: ethereal surge spell cast not working.

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* Added code to prevent the attempt to delete tasks that belong to a challenge.

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* Fixed issue 44: no-raise option not working for pet feeding.
* Fixed issue 47: bad request caused by attempting to hatch a magic quest pet
(this is an invalid combination).
* Fixed code for breaking API change in bidict (yes, another one).

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* bidict compatibility fix from nightscape.

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* Fixed the ``no-raise`` option for pet feeding.

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* Bumped to major version 2 because of the breaking change in Trello sync.
* Fixed issues in trello sync. Unfortunately they require a complete reset of
sync data. See the README.rst for details.
* CSV task uploader now recognizes "difficulty" as a column header, as well as
"priority". Documentation changed to document "difficulty", as "priority" is
deprecated and only preserved for backwards compatibility.
* Added scaling option for basic user stats.
* Added option to prevent pet raising to mounts during batch feeding.