- add tutorial for app level scheduling
- distutils are deprecated (bootstrapper)
- extended functionality for `startup_timeout` attribute in TaskDescription
- fix install of internals.rst
- fix option check in mpiexec
- implement startup signal
- make it simpler to assign session IDs to experiments
- make sure task tmpdirs exist
- overwrite `NumaNode.as_dict()`
- random changes to update old code snippets - please ignore in review
- simplify NUMA scheduling, improve examples
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