* add a new example using transport and protocol
* rewrite the example using streams to make it much simpler (remove error
  handling, use a simpler Python code)
* copy (and adapt) more documentation from the subprocess module:

  - add a note about Process.wait() deadlock
  - add a note about shell injection
  - etc.

* sort Process methods and attributes in the same order than subprocess.Popen
  methods and attributes, so the documentation looks closer
* list differences between Process and subprocess.Popen APIs

instanciate a subclass of SubprocessProtocol

Modify also the get_pipe_transport() doc to mention explicitly the supported
file descriptors.

Thanks to Ezio for noticing this

Thanks to Ezio for noticing this

int converter.  This permits using the int converter with enums and
typedefs.

Trying to use run_tests.py for testing is more trouble than it's
worth; reverted to rt.bat.  Also cleaned up rt.bat a bit.

Trying to use hg purge to clean up after testing is also
error-prone, so we're back to using the build solution's Clean
targets.

The function schedules the execution of coroutines, it's not just a wrapper for
something.

Patch by Michel Albert.  We don't normally do patches that just tweak
whitespace, but ipaddress is relatively new and the package maintainers
approved the patch.

Fix also the reate_unix_connection() doc: the method is not support on Windows,
not need to mention that ssl is not support with ProactorEventLoop.

Patch by Meador Inge.

This gets rid of  Tcl warnings when they are handled later when the root is
already destroyed.

This gets rid of  Tcl warnings when they are handled later when the root is
already destroyed.

Patch by Chris Jerdonek.