Fixed slow backend warning in Python driver.
Fix packaging of python and javascript

OTS review by @coffeemug
fixing importing a single file, as well as adding options for csv files: --no-header, --field-names, and --delimiter
Connection port is now converted to an integer and raises an exception if it could not.

Conflicts:

	drivers/python/rethinkdb/net.py
adds port conversion test
fixes test
Preliminary 1.7.1 release notes