Scriptabit

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* Fixed 13: incorrect pet count when API error occurs.
* Made pet-care commands more logical (issue 16)
* Fixed issue 14: trying to feed pet when mount already exists.
* Fixed issue 15: errors if config and user plugin directories don't exist on
first run (when depth is > 1)
* Added note to CSV plugin docs indicating that Daily repeat options are not
supported.

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* Added trello plugin usage documentation.
* Added pet hatching function to pet care plugin.
* Updated documentation.

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* Added pet feeding function to pet care plugin.
* Trello cards that are both new and completed are now synchronised to Habitica
if their last update time is more recent than the last synchronisation.
* Added support for a 'no sync' label on Trello cards. Cards with this label are
ignored even if they meet all the other criteria for synchronisation.
* Added pet care usage documentation.

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* Updated usage documentation for banking, and CSV upload.
* Added transaction fee option to banking functions.
* Added tax feature to banking plugin.
* Added direct gold amount setting to utility functions (-gp X)
* Changed bank fees to use a diminishing returns function, to reward the larger
risk of saving longer to deposit larger amounts.

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* Added checklist support to Trello sync
* Added CSV batch task creation plugin.
* Slightly improved error handling during task sync. Now an error in a task
doesn't bring the whole sync down. Instead it logs the error and skips to the
next task.
* Made sync of task description/extra text optional, with default to False.

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* Refined sync log message levels to reduce the spam at info levels
* Added notification ability by using a scoreless habit whose text can be
updated by scriptabit functions.
* Added notifications to banking and trello plugins.
* Added global command-line argument for specifing the update interval of
looping plugins.
* Implemented ability to set default difficulty and character attribute for
cards on a Trello board.
* Implemented ability to sync all cards on a board, or just those assigned to
the current user.
* Minor bug fixes, and lint warning cleanups.