Use deque for ~4x speedup when reading array columns

[dourvaris]

This PR increases performance when dealing with larger array columns by ~4x by using a collections.deque instead of queue.Queue.

Profiles are below. For reference, the clickhouse query took ~100ms to return the data and clickhouse_driver took 1300ms (queue.Queue) and 300ms (collections.deque) when processing the data to python objects.

I still think there may be room for improvement by lowering the amount of function calls, but maybe for another PR.

With queue.Queue

         1024218 function calls (1024203 primitive calls) in 1.382 seconds

   Ordered by: internal time

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        3    0.397    0.132    1.318    0.439 arraycolumn.py:126(_read)
    30206    0.125    0.000    0.329    0.000 queue.py:121(put)
    60412    0.122    0.000    0.201    0.000 threading.py:335(notify)
    30206    0.112    0.000    0.310    0.000 queue.py:153(get)
    30209    0.048    0.000    0.075    0.000 queue.py:96(empty)
    30243    0.046    0.000    0.049    0.000 {method 'read' of 'clickhouse_driver.bufferedreader.BufferedReader' objects}
    30203    0.046    0.000    0.109    0.000 arraycolumn.py:45(size_unpack)
    60412    0.041    0.000    0.056    0.000 threading.py:243(__exit__)
    60412    0.041    0.000    0.079    0.000 threading.py:255(_is_owned)
    60412    0.039    0.000    0.067    0.000 threading.py:240(__enter__)
    60412    0.038    0.000    0.038    0.000 {method 'acquire' of '_thread.lock' objects}
    60415    0.035    0.000    0.050    0.000 queue.py:208(_qsize)
       38    0.034    0.001    0.034    0.001 {method 'read' of '_ssl._SSLSocket' objects}
    60412    0.029    0.000    0.029    0.000 {method '__enter__' of '_thread.lock' objects}
    30206    0.026    0.000    0.336    0.000 queue.py:192(get_nowait)
    52513    0.023    0.000    0.023    0.000 base.py:101(<genexpr>)
    30206    0.022    0.000    0.029    0.000 queue.py:212(_put)
    30216    0.020    0.000    0.020    0.000 {method 'unpack' of 'Struct' objects}
    30206    0.018    0.000    0.025    0.000 queue.py:216(_get)

With collections.deque

             299247 function calls (299232 primitive calls) in 0.430 seconds

   Ordered by: internal time

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        3    0.180    0.060    0.370    0.123 arraycolumn.py:121(_read)
    30243    0.045    0.000    0.048    0.000 {method 'read' of 'clickhouse_driver.bufferedreader.BufferedReader' objects}
    30203    0.044    0.000    0.106    0.000 arraycolumn.py:40(size_unpack)
       38    0.032    0.001    0.032    0.001 {method 'read' of '_ssl._SSLSocket' objects}
    52513    0.025    0.000    0.025    0.000 base.py:101(<genexpr>)
    30216    0.019    0.000    0.019    0.000 {method 'unpack' of 'Struct' objects}
        6    0.016    0.003    0.054    0.009 base.py:94(_read_data)
    60441    0.014    0.000    0.014    0.000 {method 'append' of 'list' objects}
    30215    0.011    0.000    0.011    0.000 {built-in method builtins.isinstance}
        1    0.010    0.010    0.430    0.430 <string>:1(<module>)
    30206    0.008    0.000    0.008    0.000 {method 'appendleft' of 'collections.deque' objects}
    30206    0.007    0.000    0.007    0.000 {method 'pop' of 'collections.deque' objects}

[dourvaris]

Cleaned up some non relevant changes made by python code formatter. Ready for review.

[coveralls]

Coverage decreased (-0.003%) to 96.53% when pulling ecf9f07 on dourvaris:perf/arraycolumn-speedup into 3e99054 on mymarilyn:master.