3.0.0

• Breaking:
  • search(begin, end, strict) has been replaced with at(point), overlap(begin, end), and envelop(begin, end)
  • extend(items) has been deleted, use update(items) instead
  • Methods that take a strict=True/False argument now consistently default to strict=True
  • Dropped support for Python 2.6, 3.2, and 3.3
  • Add support for Python 3.5, 3.6, and 3.7
• Faster Interval overlap checking (@tuxzz, #56)
• Updated README:
  • new restructuring methods from 2.1.0
  • example of from_tuples() added
  • more info about chop(), split_overlaps(), merge_overlaps() and merge_equals().
• Fixes:
  • Node.from_tuples() will now raise an error if given an empty iterable. This should never happen, and it should error if it does.
  • Interval.distance_to() gave an incorrect distance when passed the Interval's upper boundary
  • Node.pop_greatest_child() sometimes forgot to rotate() when creating new child nodes. (@escalonn, #41, #42)
  • IntervalTree.begin() and end() are O(1), not O(n). (@progval, #40)
  • intersection_update() and symmetric_difference() and symmetric_difference_update() didn't actually work. Now they do.
  • collections.abc deprecation warning no longer happens
• Maintainers:
  • PyPi accepts Markdown! Woohoo!
  • reorganize tests
  • more tests added to improve code coverage (We're at 96%! Yay!)
  • test for issue #4 had a broken import reference