Web UI: show detailed table with hub list
Web UI: add error handler for download queue

This table should be cleared when connection to daemon is lost.
Web UI: added separate error handler for statistical data
Web UI: update connection status more frequently

And simplify this function a bit.
Web UI: fixed the width of "Size" column in download queue table
Web UI: tiny cosmetic changes in html page
Daemon: use only range-based for loops

(Modern compilers with C++11 support are required.)
Daemon: update hub.listfulldesc method.

Added field with preformatted text for displaying total share size of users on a hub.
Web UI: use preformatted text for column with total share size