0.5.0

Bug fixes

• Reject the PAGE_OR_TABLE flag when passed to map_range, which would result in corrupt table
  mappings to be created.

Breaking changes

• Updated modify_range to split block entries before traversing them, and pass only the
  descriptors and subregions that are completely covered by the given region to the updater callback
  function.
• Updated modify_range to only pass block or page descriptors to the callback function and prevent
  them from being converted into table descriptors inadvertently.
• Added rigid break-before-make (BBM) checks to map_range and modify_range.
• Marked activate and deactivate methods as unsafe.

New features

• Added new map_range() alternative map_range_with_constraints() with extra contraints
  argument.
• Added walk_range method that iterates over all block or page descriptorsthat intersect with a
  given region, without permitting the callback to make changes to the descriptors