Various (mostly layout) changes:

* Changed web site layout to two columns with left sidebar!
* Rearranged and renamed navigation YAML file
* Rearranged Navbar
* Added Google Search inside Navbar
* Rearranged and improved footer and Footbar
* Added link to Contributors page to Footbar
* Split trans page info into two include html files and placed them into sidebar
* Improved trans page title and notes
* Improved overall progress bar and moved it to sidebar
* Removed responsive class from all tables
* Minified some parts of the html
* Various little visual tweaks and responsive adjustments
* Added (hidden) CC licence into Footbar
* Copyleft CSS trick. :)
Various SEO improvements:

* Removed non transcribed posts from robots.txt file
* Added all help subpages to robots.txt file
Various content changes:

* News (section)
* Background story
* Other changes in content
* TODO update
Transcription of NB 43 in progress by victorvv.
Transcription of NB 58 done by pagansky.