better write completion path with fewer changes required to handle write completions
enable and implement cleanup interface for retrieveN
fix LMR pointer initialization
fix state transition, enable postprocessing call
enable notification flag for rdma_write in retrieve_n_keys command
postprocessing requires the request context to get passed through the event...
reqctx parameter fixing; logging and error checking for queuededicatedrequest function
fix end-of-records handling in state machine
free resources if no key is found
another reshuffle of the state machine to return proper error codes to the client
fixing copy-paste error
lmr copy not required here
add retrieve_n_keys cleanup request as case for to-string operation
preserve return values for deferred completion
Merge pull request #8 from lasch/refactor/writecompletion

merging this new part of code