Pytest-xprocess

-------------------

- pytest-xprocess now uses a sub-directory of `.pytest_cache` to store process related files.
- Drop support for Python 2.7
- Fixed bug when non-ascii characters were written to stdout by external
process
- Removed deprecated :meth:`XProcessInfo.kill`

-------------------

- Now ``XProcessInfo.terminate`` will by default also terminate the entire
process tree. This is safer as there's no risk of leaving lingering processes
behind. If for some reason you need the previous behavior of only terminating
the root process, pass kill_proc_tree=False`` to ``XProcessInfo.terminate``.

-------------------

- Drop support for Python 2.6 and 3.4.

- Ignore empty lines in log files when looking for the pattern that indicates
a process has started.

-------------------

- Never released due to deploy issues.

-------------------

- Fixed example in README.md

-------------------

- 3: :meth:`XProcess.ensure` now accepts preferably a ProcessStarter
subclass to define and customize the process startup behavior. Passing a
simple function is deprecated and will be removed in a future release.