Asammdf

Changes
* channel selection based on the channel name and source is now done with the method `MDF.whereis`
* the argument `source` was removed from the `get` methods
* in case if ambiguity `get` will not return the first occurrence but rather it will raise an exception

* added initial support for decoding LIN bus logging
* only BDC files are accepted, LDF are not supported yet
* `MDF.extract_can_logging` replaced by `MDF.get_bus_logging`
* added `MF4.get_lin_signal` and the generic `MF4.get_bus_signal`
* implements 437, 426

Fixes
* fixes 445, 444, 442, 441, 440, 439, 438, 431, 430

Changes
* new _Attachments_ tab in the GUI file view
* full screen mode using the ``F8`` key

Fixes
* fix error if the channel group flags are not set for MDF v4 (thanks to kopytjuk)
* add missing MDF V4 data types
* remove obsolete docstring for MDF4 class
* try to extract CAN bus logging when the source is set to OTHER
* compute the bus logging map for concatenated and stacked measurements
* fix mdf demo script (thanks to fesaille )

Changes
* add more arguments to the iter_groups method
* remove finalization shim and use a more generic and feature complete implementation
* add support for CANape .lab files
* removed noisy prints in plot (thank to nos86 )

Fixes
* fixes 365
* fix attribute error when loading a channel list configuration
* always use category dtype for string channels when reduce_memory_usage is True in to_dataframe
* fix drag and drop selection from channels tree