+ analyer; + analyzer test
+ worker interface
+ library interface
+ main
@ lua: throws on error
+ library impl
+ worker impl(placeholder)
tidy up
@ lua: no need to throw. lua "throw"s by its own way.
@bugfix: call request before init now throws (in lua)
@ bugfix: throws when multiple initializing now
+ add some comments on worker
+ add comments on some lua pitfalls
@ worker now owns the input source.
+ thread communication done.
small fixes

@ restructured the thread communication code.
@ bugfix:	worker::run will not return before the worker thread is
			initialized now.
now parses
- worker: removed debug code
+ configure