python driver code ported to python3
further fixes for python3 compatibility
restores a bit of python2 compat
remove change to testing
unicode test fixes
python 2.6 support in the polyglot tests
fix setup script for Python 3
Merge branch 'python_3' of github.com:rethinkdb/rethinkdb into python_3
Add make install rule to py driver
Merge branch 'python_3' into next

Conflicts:
	drivers/python/Makefile
	drivers/python/rethinkdb/ast.py