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Added
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* support of mathematical expressions in Markdown, using `python-markdown-math <https://pypi.python.org/pypi/python-markdown-math>`_
and `mathjax <https://www.mathjax.org/>`_
* an article can link an image using the image field; this is shown in the article summary in home;
Changed
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* now the title of the blog home page is more meaning;
* in blog home, 1st article is more evident, others are on two columns;
* upgraded to Django ver 2.1.2;so:
* changed login urls in urls.py due to change in Django;
* mv templates/login.tml to templates/registration/login.html (as before);
* changed login_required in views.py, otherwise they were not functioning (as before);