xml, ipynb, csv: refactor

...bootstrap3/js/invenio_previewer/csv_previewer/csv_d3js.js

...ets/bootstrap3/js/invenio_previewer/csv_previewer/init.js

...s/bootstrap3/js/invenio_previewer/csv_previewer/loader.js

...ts/semantic-ui/js/invenio_previewer/csv_previewer/init.js

invenio_previewer/extensions/__init__.py

invenio_previewer/extensions/ipynb.py

invenio_previewer/extensions/mistune.py

invenio_previewer/static/css/prismjs/simple.css

invenio_previewer/static/js/csv_previewer/csv_d3js.js

invenio_previewer/static/js/csv_previewer/init.js

invenio_previewer/static/js/csv_previewer/loader.js

invenio_previewer/static/js/zip/fullscreen.js

invenio_previewer/templates/invenio_previewer/csv_bar.html

invenio_previewer/templates/invenio_previewer/ipynb.html

...ewer/templates/semantic-ui/invenio_previewer/csv_bar.html

...viewer/templates/semantic-ui/invenio_previewer/ipynb.html

invenio_previewer/webpack.py

setup.cfg

tests/test_macros.py