more licence strings to help FOSSA

Rework readme

README.rst

@@ -16,18 +16,29 @@ HTML Entities for Python
    :alt: Code coverage
    :target: https://codecov.io/gh/romain-dartigues/python-characterentities
 
+About
+#####
+
+Licence
+=======
+
+This project is licensed under the terms of the BSD 3-clause "New" or "Revised" license.
+
 Motivations
-###########
+===========
 
-`python-htmlentities`_ drop-in replacement sponsored by `GeoKrety-API`_ adding:
+`python-htmlentities`_ replacement sponsored by `GeoKrety-API`_ adding:
 licence, Python 3 support, unit tests and support for a lot more code-points.
 
+.. Note::
+  Only the 0.1 branch will ever attempt to provide a reasonably compatible
+  API and results towards `python-htmlentities`_.
+
 Alternatives
 ############
 
 * `python-htmlentities`_: original inspiration
-* `namedentities`_: found later, I wouldn't have started this project
-  if I knew about it sooner !@#%
+* `namedentities`_: found later
 
 .. _python-htmlentities: https://pypi.org/project/htmlentities/
 .. _namedentities: https://pypi.org/project/namedentities/

characterentities/__init__.py

@@ -1,4 +1,6 @@
 #!/usr/bin/env python
+# This file is licensed under the terms of the BSD 3-clause "New" or "Revised" license.
+# See the LICENSE file in the root of this repository for complete details.
 '''characterentities - converter for SGML characters references
 
 '''