Add workbook to tasks#206

Merged

t8y8 merged 8 commits intotableau:developmentfrom

williamlang:add-workbook-to-tasks

Jul 20, 2017

Commits on Jul 13, 2017

add workbook id to tasks and add tests
William Lang
committed
add workbook id to __repr__
William Lang
committed
remove unused imports
William Lang
committed

Commits on Jul 17, 2017

add target class to abstract references to other objects
William Lang
committed
forgot a new line
William Lang
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aaaand another new line
William Lang
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Commits on Jul 19, 2017

add test for schedule id, refactor target
William Lang
committed

Commits on Jul 20, 2017

remove #
William Lang
committed