Cr8

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

- Added a new ``reindex`` command which will go through all tables on a cluster
which need to be re-indexed to be compatible with CrateDB major_version+1. It
will one by one create a copy of a table and then remove the old table,
replacing it with the copy.

- Added a new ``infile`` argument to the ``insert-json`` command. This should
make certain scripting scenarios easier.

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

- Added type mapping for the ``timestamp with time zone`` and ``timestamp
without time zone`` data types so that ``insert-fake-data`` can generate data
for those columns by default.

- ``run-crate`` now supports arbitrary branch builds. E.g. ``run-crate
branch:master``

- Removed the ``LineBuffer`` from ``run_crate`` and added support for callables
instead.

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

- Fixed a compatibility issue with Python 3.6

- Adapted some queries and type mappings to be compatible with CrateDB 4.0

- Corrected the minimum CrateDB version that can be run with Java 11.

- Added a ``version`` arg to ``CrateNode`` which can be used to overrule
the auto-detection.

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

- ``run-crate`` will now try to choose a different ``JAVA_HOME`` if the given
version of ``CrateDB`` can't be run with the default ``JAVA_HOME``. This
behavior can be disabled with ``--disable-java-magic``.
The behavior of the ``CrateNode`` API is unchanged and by default won't try
to change the ``JAVA_HOME``.

- ``run-crate`` will now avoid re-building branches from source if there aren't
any new commits.

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

- ``run-crate <release_branch>`` will now make sure that the sources are
updated to avoid stale builds.

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

- Made ``run-crate`` where the argument is a path to a repository forward
compatible with upcoming build changes.