python fixes as per review
js fixes as per review
forgot to commit a file
implements #640 in Python driver
fixes #650, END instead of STOP in py driver
Merge branch 'v1.4.x' into js_py_driver_review

Conflicts:
	drivers/python/rethinkdb/net.py
	drivers/python/rethinkdb/query.py
Resolves last circular dependencies in Python driver
adds unit test for issue #650
Fixes #632 for Python driver
Adds regression test for #632
Fixes unicode error in Python polyglot test driver
Merge branch 'js_py_driver_review' into v1.4.x