fix err msg memory leak, fix destroy func bug when no file, fix destroy to return a ZMapServerResponseType

remove openserverload, add functions to allocate/destroy requests, add proper support for all requests, handle 'unsupported' requests properly.

correct a couple of func prototypes so all funcs return a ZMapServerResponseType. Fix return code from close ruotine.

Some extra code to test notebook saving code. Not sure of it's worth to users.

- save to config file