Intermediate commit on moving to multi-chunked TFChunk.
PosMap made 12 bytes long with corresponding changes.
Updated TFChunkDb to account for multi-chunks. Removed old PrefixFileNamingStrategy.
Corrected TFChunk code to account and work correctly with empty scavenged chunks.
Added tests for merging scavenge.
Commited missing files.
TFChunkManager caching finished and tested.