Added docstrings to MooseStatus
Moved some private song functions to moose-song-private.h
Added comments to moose-misc-threads.h or moose-misc-gzip.h
Separated private client functions to moose-mpd-cient-private.h
Added doc-strings to MooseStoreCompletion.
Added doc-strings for MooseQueryParser
Removed some crust from the store api