accurator/commit

Item page is generated at backend, solves #190.

 api/accurator.pl             | 158 +++++++++++++++++++++++++++++++++++++++++++
 lib/accurator/ui_elements.pl |   4 ++
 web/html/item.html           | 137 +++++++++++++++++++++++++++++++++++++
 web/js/accurator_item.js     |   7 ++
 4 files changed, 164 insertions(+), 142 deletions(-)