Refactored HTTP protocol implementation.
Introduced a Callback functional interface.
Simplified HTTP request router.
Added support for HTTP request handling interceptors.
Redesigned DB transaction API and implementation.
Added transactional HTTP request interceptor for apps.
Removed obsolete code.
Fixed transaction callback notification when no data is written.
Minor improvements in app runner.
Fixed async handling of HTTP results.
Enhanced read-only form field views.
Added path segment retriever in HTTP exchange.
Fixed recently introduced DB persistence bug.