Refactor BULK_LOADING_BATCH_SIZE size as a define.
Added new GTWAOFRaw class for large data (will be used in GTWAOFRawDictionary).
Added new GTWAOFDictionaryTermFlagExtendedPage enum value.
Added support for RawValue pages in gtwaof CLI tool.
Added NOTES.md with notes on the on-disk structure of pages.