WIP: PDP: presun jupyterize tagu a prislusnych templates pod PDP

pdp/templates/jupyter/basic.tpl

pdp/templates/jupyter/celltags.tpl

pdp/templates/jupyter/mathjax.tpl

pdp/templates/jupyter/my.tpl

pdp/templatetags/__init__.py

pdp/templatetags/pdp_filters.py

...ce_konopi/templates/regulace_konopi/snippet_sections.html

uniweb/migrations/0010_auto_20201127_1123.py

uniweb/templates/uniweb/snippet_sections.html