Total-perspective-vortex

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* Fix tests by nuwang (PR 138)
* Add lint warning for tools with `cores` and no `mem` by natefoo (PR 140)

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* Update shared db short link by nuwang (PR 128)
* Improved docs by nuwang (PR 126)
* Add optional slow tests by nuwang (PR 66)

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* Fix get_dataset_size for datasets with null file_size column by mvdbeek (PR 116)
* Add contributing doc and update readme by afgane (PR 122)
* Add readthedocs configuration by nuwang (PR 121)
* Add to to_dict functions to Destination and TagSetManager classes by pauldg (PR 119)
* Add a helper to get the object store ids and the datasets size for every dataset in a job by sanjaysrikakulam (PR 125)

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* Fix legacy version parsing by using Galaxy's version parsing if available by bgruening (PR 112)
* Fix E721 for type comparison by mvdbeek (PR 113)

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* Add two tests around destination inheritance (one fails) + fix by cat-bro, nuwang (PR 110)

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* fix resubmission tests by bernt-matthias (PR 78)
* Fix issue with how default inheritance is applied to multiple files by nuwang (PR 105)
* Fix evaluation to support resource clamping by nuwang (PR 107)