merged
style
Python driver: make default printable

Closes #1476
Review 953 by @jdoliner
everything is broken
Bump python driver version to 1.9.0-1
shit is REALLY broken
things are slightly less broken
compiles but broken
ruby tests pass
ReQL tests pass
working on unit tests
merged
bugfix and regression test
Merge remote-tracking branch 'origin/v1.9.x' into HEAD
fixing crash when connecting to an old version of rethinkdb
fixes D1655 D1660
fixed D1662
made some debug-only things only compile in debug mode
made batched_insert_t not contain a vector of keys
fixed test back