[semver:minor] Compatibility fixes and LGPL license

As with psyplot 1.4.0, psy-reg is now continuously tested and deployed with CircleCI.

Fixed
-----
-   psy-reg is now officially licensed under LGPL-3.0-only, see [#9](#9)

Added
-----
-   psy-reg does now have a CITATION.cff file, see <https://citation-file-format.github.io>

Changed
-------
-   Documentation is now hosted with Github Pages at <https://psyplot.github.io/psy-reg>. Redirects from the old documentation at [https://psy-reg.readthedocs.io]{.title-ref} have been configured.
-   Examples have been removed from the psy-reg repository as they now live in a central place at <https://github.com/psyplot/examples>
-   We use CicleCI now for a standardized CI/CD pipeline to build and test the code and docs all at one place, see [#8](#8)

Author: Chilipp

.circleci/config.yml

@@ -1,7 +1,7 @@
 version: 2.1
 
 orbs:
-  psyplot: psyplot/psyplot-ci-orb@1.5.24
+  psyplot: psyplot/psyplot-ci-orb@1.5.25
   mattermost-plugin-notify: nathanaelhoun/mattermost-plugin-notify@1.2.0
 
 executors:

CHANGELOG.rst

@@ -0,0 +1,28 @@
+v1.4.0
+======
+Compatibility fixes and LGPL license
+
+As with psyplot 1.4.0, psy-reg is now continuously tested and deployed with
+CircleCI.
+
+
+Fixed
+-----
+- psy-reg is now officially licensed under LGPL-3.0-only,
+  see `#9 <https://github.com/psyplot/psy-reg/pull/9>`__
+
+
+Added
+-----
+- psy-reg does now have a CITATION.cff file, see https://citation-file-format.github.io
+
+
+Changed
+-------
+- Documentation is now hosted with Github Pages at https://psyplot.github.io/psy-reg.
+  Redirects from the old documentation at `https://psy-reg.readthedocs.io` have been
+  configured.
+- Examples have been removed from the psy-reg repository as they now live in a
+  central place at https://github.com/psyplot/examples
+- We use CicleCI now for a standardized CI/CD pipeline to build and test
+  the code and docs all at one place, see `#8 <https://github.com/psyplot/psy-reg/pull/8>`__