v0.2.0

• impl handle_site_bad_files
• impl handle_cert_(set/list)
• handle /Websocket route with serve_websocket
• handle_file_(get\need) improvements
• improve serve_websocket security
• impl handle_cert_select fn
• DBQueryRequest & SitesController::db_query > change method/struct sig to accept params
• SitesController::parse_query and tests
• Add a info log when UiServer starts
• UserSiteData handler
• Fix Sites sub dir serving
• Several Internal changes and bug fixes, See diff for full commit changes.