Anypytools

Fixed a small issue with using AnyPyTools with pytest 6.0.0rc1

Adressed a deprecation warning from pytest plugin due to API change in pytest 5.4

Fixed regression with Python 3.8 where model output could not be serialzed. This
happend because empty folders (represented by "...") would become the python elipsis object.

**Fixed:**

- A potential bug when using the pytest plugin and expected errors in AnyScript test files.
- Fixed a bug with the pytest plugin not working with pytest 5.4

**Fixed:**

- Fixed a bug where log files would be removed even if the processing failed.

**Changed:**

- Progressbars are now draw using [tqdm](https://github.com/tqdm/tqdm). This enables error
messages while the progress bar is rendering, and solves a problem with detecting when the
code is running in Jupyter notebook and not.
- Running the pytest plugin with the `--anytest-save` argument now deselects
all tests which doesn't save data to HDF 5 files.
- New option for running the GUI version of AMS with AnyPyTools instead of the console.
- Task meta info (i.e. `task_logfile`, `task_macro` etc.) are now hidden by default in the
when printing the object witht the default `__repr__()`
- The `return_task_info` argument to `AnyPyProcess` class is now deprecated and task information is
always include in the output.