fix typo
Parse handlers and store meta informations
add slf4j simple for logger
set context.result if it is Handler
fix check result is NO_ADAPTER
fix not get parameters and fields in loop
run HandlerField every time
handle errors that occur in before()
don't run the handler even the exception is handled

Imagine that a middleware throw an exception to break the
chain, and this is excepted, so use @HandleErrors to catch it.
The chain is already broken and the exception is handled, so
we should not run the handler method. However, the cleanup
methods should be executed.
don't set context.result if exception occurs after before()
fixing doc
run all adapters while generate doc
fix types while generate API
Merge branch 'meta'