Crash

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- Fixed an error caused by using the ``\verbose`` command before using
``\connect`` to connect to a host.

- Exit Crash correctly if an error occurs on startup, such as invalid host
format or unauthorized access to CrateDB.

- Do not show connect message on startup by default but only when starting
crash in verbose mode. This prevents the programme from printing the message
to stdout when using the command mode or executing ``--sysinfo``.

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- Fixed an issue where BACKSPACE would delete more characters before the
cursor than expected.

- Added back support for multiline table headers

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- Remove support for multiline table headers

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- Added a status toolbar that prints the current session info.

- added support for multiline table headers in the tabular output format

- Start autocompletion for non-command keys at the 3rd character.

=================

- Updated crate-python to 0.20.1 which includes the following change:

- Fixed deprecation warnings logged in CrateDB server on every REST request.

=================

- Fixed: ``\verbose`` command didn't not switch on verbosity if ``crash`` was
launched without the --verbose` flag.