Speedtest-cli

* Address issue where a test server may return an HTTP error during upload or download
* Address issue where `ignore_ids` may be empty or have empty values

* Prevent warnings on Python3.8
* Fix proxy support
* Fix `--single` to ensure threads are not started until a position in the queue is available

* Fix SSL support on Python2.4 and Python2.5

* Automatically resolve `.best` property
* Pass `Content-Length` header with POST requests
* Fix install instructions with git clone
* Add functionality for single threaded testing
* Add debug support to show if a URL request resulted in a redirect
* Add the python version to the version output
* Switch from `platform.system` to `platform.platform` when building the `User-Agent` header
* Don't pass `server_hostname` to `ssl.wrap_socket`
* ensure ERROR doesn't print an empty string

* Ensure we are utilizing the context created by HTTPSConnection, or falling back to ssl.

* Handle malformed XML responses
* Ensure `--share` works with `--csv`
* Fix SSL communication during latency tests on python 2.6 and older
* Handle error where latitude and longitude from config are invalid