New creates the logger, with the streaming pipe and singaling channel.

NewBufferedPipe returns a new buffered pipe instance the internal buffer is initialized to default size.

logFilePrefix is the prefix for file names of all vic-machine log files.

logFileSuffix is the suffix for file names of all vic-machine log files.

BufferedPipe struct implements a pipe readwriter with buffer.

DatastoreReadySignal serves as a signal struct indicating datastore folder path is available.