This patch adds support for custom S3 servers in the connection string.
It also adds explicit support for setting the server port, and whether
or not to use SSL, both as paramaters to the smart_open function as
well as within the connection string.

These changes are neccessary to be able to connect to s3proxy and
other custom s3 servers which don't run on the default port,
or neccessarily use SSL.

 into RaRe-Technologies-master

Conflicts:
	smart_open/tests/test_smart_open.py

Adds support for opening vanilla HTTP and HTTPS addresses.
Supports efficient streaming, gzip and bz2 compression,
as well as Kerberos and username/password (basic) http
authentication.

We still want to maintain Python 2.6 compatibility,
so don't rely on contextlib.closing.

Now they don't require internet access, and will test for
Basic authentication in the HTTP header.

http => https, and remove old versions of the tests.

Conflicts:
	CHANGELOG.rst
	smart_open/smart_open_lib.py

This allows one to use any filehandle-like object instead of
just local posix. It also avoids unneccessary filesystem syscalls.

This breaks out the http tests into their own test class.

Also fixed a few behaviors in the HttpReader uncovered by
the new tests (yay).

Works now on Python 2 as well as Python 3.