Pip-run

======

Add support for reading deps from Jupyter Notebooks.

======

43: Removed workaround for pip 4106. Project now requires
pip 19.3 or later.

======

* semver deviation *

41: Removed support for ``__dependency_links__``
in scripts. Instead, use PEP 508 syntax.

For example, to run a script requiring requests at master::

__requires__ = ['requests git+https://github.com/requests/requests']

======

39: Removed ``pip_run.deps.on_sys_path``, originally intended
for API-use for making packages available at run time in
the same process.

===

36: Instead of soliciting the environment variable,
the workaround for pip 4106 is now automatically
applied, but only when it is needed.

===

36: Allow bypass of workaround for pip 4106
by setting ``PIP_RUN_NO_PATCH_PREFIX``.