Python Driver v1.12.0-1
Merge pull request #2292 from rethinkdb/atnnn/notes

Release notes for 1.12.4
adding better error message when using an incomplete cursor on a closed connection
JS driver - Error if a base is provided in reduce
Do not have more than one outstanding CONTINUE request
Python driver 1.12.0-2
Merge commit '53e23c7' into HEAD

Conflicts:
	drivers/python/setup.py
Fix for the second part of #2285
Added a regression test for #2399.
Initialize reader_t::items_index
Check pseudo types before inserting them into a table.
Remove unused literals from results of merge
Added another test case to the 2399 regression ReQL test.
Reworked datum_t::drop_literals()
Reverted datum validation
drop_literals() doesn't copy the datum anymore if it doesn't encounter a literal.
Added r_sanity_check for nested literal keywords.
Improved #2399 regression test.
Fix order_by on empty sequences.
Fix argument check in order_by.
Fix code style.