Move development collateral into a dev/ folder

This keeps the root directory cleaner. Dependent files and documentation
has been modified to relfect the change.

Additionally, the bump.sh file has been updated to force the use of
bump2version over bumpversion, and to use a cross-platform sed
invokation.

1 files changed, 2 insertions, 2 deletions

diff --git a/README.rst b/README.rst
index 2b3108e..3a27b32 100644
--- a/README.rst
+++ b/README.rst
@@ -394,12 +394,12 @@ with the ``-e`` flag, e.g. ``tox -e py36``. Static analysis is done with ``tox -
 You can see all available testing environments with ``tox --listenvs``.
 
 If you do not wish to use ``tox``, you can install the testing dependencies with the
-``dev-requirements.txt`` file and then run the tests manually using
+``dev/requirements.txt`` file and then run the tests manually using
 `pytest <https://docs.pytest.org/en/latest/>`_.
 
 .. code-block:: console
 
-    $ pip install -r dev-requirements.txt
+    $ pip install -r dev/requirements.txt
     $ python -m pytest
 
 Note that above I invoked ``python -m pytest`` instead of just ``pytest`` - this is because