Removed id generation in form field tags.
Supporting attr_ getters and setters (due to name collision with keywords).
Added convenient Mockito-based mock utils in test commons.
Redesigned tag context attachment and rendering.
Added JSON toolkit warmup when a HTTP server starts.
Changed tag handle type to int.
Minor improvements in form example page.
Implemented serialization of session, tags, widgets, pages and handlers.
Fixed traversal of unmodifiable tags.
Simplified tag context implementation.
Introduced field values transmission together with AJAX events.