Crash

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

- require crate-python 0.12.3 to get support for the iterator protocol
on cursor

- Fixed an error that caused crash to crash on non posix platforms.

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

- require crate-python 0.12.1 so crash sends the correct Accept Header when
requesting crate

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

- increased crate-python requirement to 0.11.2 for the improved failover
mechanism

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

- crate server version information is now also included in the connect-output.

- improved formatting of field lists in docs
by adding docutils configuration to docs build process

- updated crate-python to version 0.11.1 to get a more reliable failover
mechanism if a host goes down.

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

- fix: correctly apply ``-v`` switch to increase verbosity

- update crate-python to version 0.10.6

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

- fix: avoid stripping arbitrative whitespaces from
commands passed via stdin