message: Make IndexMeta public
diff: @@ -226,7 +226,7 @@ mod docset;
  pub use self::docset::{DocSet, SkipResult};
  pub use core::SegmentComponent;
  -pub use core::{Index, Searcher, Segment, SegmentId, SegmentMeta};
  +pub use core::{Index, Searcher, Segment, SegmentId, SegmentMeta, IndexMeta};
  pub use core::{InvertedIndexReader, SegmentReader};
  pub use directory::Directory;
  pub use indexer::IndexWriter;
  