Crash

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

- Floating point values are no longer rounded to 6 places under python2.7 if
output using the tabular or mixed output format.
Now the behaviour for all output formats is the same and consistent with the
python3 output format.

Python2.6 will still display rounded values.

- Fixed the issue casuing parsing error while using internal ``non-sql`` crash
commands with semicolon.

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

- Fixed output tabular format bug which results in wrong representation
of a string containing a floating point value.

- Updated wording of the cluster check command output.

- Added the check command which queries the ``sys.checks`` table for
cluster checks

- updated crate-python to 0.13.4 which includes following changes:

- Fix urllib3 error with invalid kwargs for ``HTTPConnectionPool``
when ``REQUESTS_CA_BUNDLE`` is set

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

- added multiline support for tabular output format

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

- added `dynamic` as output format option

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

- display command help in case the command is not used correctly

- display NULL values in mixed mode correctly

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

- Fixed broken 'mixed' output style due to overriding import

- Improved readability of sql syntax highlighting

- Attempting to use unknown command now results in an error

- added ``--version`` to cli interface to show crash version and exit