Create a copyright list on the about page

[Vsevolod Velichko]

About page should contain a list of copyright holders. For each person there should be a list of licenses and a list of files licensed under this license.
E.g.:
* Ruslan Nigmatullin:
   - GPLv2
      - file1.cpp
      - file2.cpp
   -GPLv3
      - file3.cpp
      - file4.cpp

Every list should be shrinkable and shrinked by default.
Copyright list can be generated by command like:
 $ licensecheck -r --copyright .|perl -e 'my @strings;my $file,$license;while(<>){if(/^$/){$file="";$license="";}elsif(/(\.[^:]+): (.*)/){$file=$1;$license=$2;}elsif(/\[(.*)\]/){push @strings,"$1 || $license || $file\n";}}foreach my $u (@strings){print $u;}'|sort

Content for the template should be in format, appropriate to easy replacement by updated copyright content.