Basic plubming defined.
Cleanup unusued parts.
Draft multi-buffer solution.
Slow, but probably functioning...
Better reporting on encode.
WIP: Working getting sliding window buffer to work...
Merge branch 'master' into bigfile
Fixed reposition ignored issue.
MemMap Encoder includes drop-this-field type 'x'.
Merge branch 'AggregateReducer' into bigfile
Workign single-thread, sliding-window.  Not working on multi-thread.
Sliding window memmap working across multiple tasks.
Better maximum buffer-size default.
Tuned buffer size.
Merge of initial large file support.