- added: `F.stats.response.errorBuilder` with count of sent ErrorBuilders

- added: `F.stats.response.image` with count of processed images via GM or IM

- added: `F.stats.request.schema` with count of request to SchemaBuilder

- added: `TRACE(message, [name], [url], [ip])` is an alias for `F.trace()`

- added: `F.config['trace-console']` (default: `true`) shows tracing on the console

- added: `F.convert(name, type/function(val))` registers a new convertor (convertors uses QueryParser (GET/POST))

- fixed: `String.parseInt2()` - a possible NaN value

- fixed: `String.parseFloat2()` - a possible NaN value

- improved: code

- improved: CPU and memory consumption

- improved: performance