Trusted Hierarchy

Fix

• Eq did not work correctly between !TrustedHierarchy bitsets.

Changed

• BitSetInterface changed (simplified).
• BitSetOp renamed to Apply.
• BinaryOp renamed to BitSetOp.
• binary_op module renamed to ops.
• All former binary_op operations renamed.

Added

• BitSet, BitSetOp, Reduce now duplicate part of BitSetInterface in
  order to prevent the need of BitSetInterface import.
• CachingIndexIter now have former IndexIterator functionality.
• CachingBlockIter now have former BlockIterator functionality.
• BitSetInterface::is_empty().
• BitSetBase::TRUSTED_HIERARCHY.

Removed

• IndexIterator removed.
• BlockIterator removed.