added message and css styles to block access to site when JavaScript is disabled, minor fixes in views.py

changes in header.css:
- added styles for noscript element

changes in header.jinja2:
- added noscript message at the beginning of the page

changes in views.py:
- removed redundant elif checks
- removed not necessary encodes to latin-1
Merge branch 'master' of https://github.com/Michaluch/rivneITA003