New intbitset data structure for storing integer in a set, using fast bit-level operations.
Removed wrong comment.
Replaced "+=" operator to satisfy older Pyrex versions. Updated docstrings.
Updated description string.
Support both Cython and Pyrex.
Fixed the try clause syntax problem.
Fixed bug in fastload method.
Cleaned spacing, docstring and added nice __str__.
Added buffer interface. It still don't work. Need some investigation.
Fix compatibility bug.
Reorganization of code.
New intbitset with universe support.
Fixed bug.
Fixed bad bug!
Fixed bug where intbitset.__nonzero__ reported wrongly non empty sets as empty.
Added checks for negative numbers.
Intbitset: Renamed universe to trailing_bits, some docstrings cosmetics, some more exceptions handling.
Added nice speed optimizations for intersection and subtraction between intbitsets.
Fixed bug where intersection in place between empty intbitset and non empty intbitset with elements over the word size, return a non empty intbitset.
Added helper functions extract_finite_list (see docstring) and is_infinite.