Tej

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Features:
* Cache resolved queue location
* Add cleanup function, to remove the queue and links

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Behavior change:
* Logging on tej.server now happens with level INFO (was WARNING).

Bugfixes:
* stdout is now recorded correctly on PBS
* Fix escaping, making tej work when the queue is a relative path
* Don't log the password

Features:
* `submit()`'s `script` parameter now accepts a full command in addition to a filename
* Expose `_ssh_client()`, allowing children classes to override the SSHClient settings
* Make status constants strings, which means they can be directly compared with `info['status']` from `list()`

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Bugfixes:
* Better quoting (useful if using spaces or unusual characters in paths)
* Test runner no longer hides logging messages

Features:
* Add `queue.get_scp_client()`, useful to transfer files using the same connection
* Add optional password to destination string

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Bugfixes:
* Fix typo: `InvalidDestionation` -> `InvalidDestination`
* Avoid using argparse's 'parents' features (see [PY23058](https://bugs.python.org/issue23058))
* Fix formatting of dates showing a warning

Features:
* Add runtime selection to API, command-line (`--runtime`), and auto-detect by default
* Add support for PBS: jobs will be run using qsub

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Bugfixes:
* Fix having multiple `tej.log` files on the server

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VisTrails packages taken out, moved to VisTrails' repository.