v0.0.9

Notable changes:

• xrefs.Decorations: nodes will not be populated unless given a fact filter
• xrefs.Decorations: each reference has its associated anchor start/end byte offsets
• Schema: loosened restrictions on VNames to permit hashing

Notable additions:

• dedup_stream: add --cache_size flag to limit memory usage
• C++ indexer: hash VNames whenever permitted to reduce output size

Notable fixes:

• write_tables: avoid deadlock in case of errors