- [x] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? ----- This includes a functionality change and several tests adjustments (beyond enabling Windows in the test matrix, with the particular case of installing extra dependencies). The functionality change reflects the fact that there is no "os.pipe" nor "select" in Windows, so: - used `win32pipe` module from `pywin32` package to create a proper pipe represented as a file descriptor (with `FdCreatePipe`) so it can be used as a subprocess' "stream" - use a totally different loop for reading, which is blocking, so I had to write an extra byte on stopping (to unblock the reading), and support that byte in the read loop Note 1: all the previous changes are only for "windows mode", which after a little refactor is just enclosed in the _PipeReaderThread class. Note 2: tests for stream/pipe reading did not really change beyond the refactor just mentioned; "external" functionality is fulfilled just fine, for which I added an "example" suitable to be run in Windows. The test changes are scattered in several test files, but they are mainly grouped in: - better path representation in the test assert - support for different "time behaviour" (specially in the log filepath timestamp)