v0.26.2-rc1

• Repetitions in the search tree are marked as draws, to explore more promising lines. Enabled by default (except in selfplay mode) use --two-fold-draws=false to disable.
• Syzygy tablebase files can now be used in selfplay. Still need to add adjudication support before we can consider using this for training.
• Default net updated to 703810.
• Fix for book with CR/LF line endings.
• Updated Eigen wrap to use new download link.

If you build from source, note that old versions of meson cannot download from the new Eigen download link. You will either have to update meson or build with -Dblas=false.