Changes since 0.2.2:
* __repr__ for Smallest() and Largest() now correctly returns an evaluable 
  expression
* __str__ for Interval returns values in a different form.  For example, (3..6)
  instead of (3,6), [3...) instead of [3,~), and (...) instead of (-~,~)
* Changed inf to Inf (to be more consistent with Python constants, i.e. True, 
  None)
+ Added __repr__ to Interval
+ Added __repr__ to IntervalSet
* Changed docstrings to conform more to the standard format
+ Added Interval.none as a method that returns an empty interval
+ Added __eq__ to Interval
+ Added __and__ to Interval
* Changed less_than and greater_than to only allow one parameter
+ Added greater_than_or_equal_to and less_than_or_equal_to
- Removed __nonzero__ from Interval (redundant)
+ Added __getitem__ to BaseIntervalSet
+ Added __iter__ to BaseIntervalSet
+ Added __delitem__ to IntervalSet
+ Added lower_bound() to BaseIntervalSet
+ Added upper_bound() to BaseIntervalSet
+ Added bounds() to BaseIntervalSet

Changes since 0.2.1:
* Modified BaseIntervalSet.__eq__ so that an empty set is equal to another
  empty set
+ Added BaseIntervalSet.__cmp__ that raises TypeError like set
* Modified BaseIntervalSet.__invert__ so a FrozenIntervalSet is generated for a
  FrozenIntervalSet
* Modified BaseIntervalSet.__iter__ so that point Intervals are returned as 
  discrete values instead of as Intervals
* Changed BaseIntervalSet.__add so it no longer adds a set as a special case
* Changed BaseIntervalSet.__eq__ so that any type is comparable, but False is
  always returned for non-BaseIntervalSet types
+ Added BaseIntervalSet.__ne__
* Changed Interval so it can only contain hashable objects
* Renamed arguments and member values of Interval.__init__
* Fixed bugs relating to FrozenIntervalSets
* Modified FrozenIntervalSet.__init__ so that initializing a FrozenIntervalSet
  with another FrozenIntervalSet returns the initializing value.  Odd...
* Modified IntervalSet.pop so it pops a discrete value instead of an Interval if
  the Interval is a single point
* Renamed greaterThan to greater_than
* Renamed lessThan to less_than
* Renamed notEqualTo to not_equal_to
* Renamed adjacentTo to adjacent_to
* Renamed comesBefore to comes_before
* Renamed equalTo to equal_to

Changes since 0.2.0:
+ Renamed Interval.__add__ to Interval.join
* Changed parameter names for Interval.__init__ and added default values
* Changed BaseIntervalSet.__contains__ so that it no longer does a subset
  test
* Modified BaseIntervalSet.__issubset__ so that it only operates on other
  BaseIntervalSets
* Modified IntervalSet.remove so that it only removes intervals, sets, or
  discrete values
* Modified IntervalSet.update so that it operates on another BaseIntervalSet
  operand only
* Modified IntervalSet.intersection_update so that it operates on another
  BaseIntervalSet operand only
* Modified IntervalSet.difference_update so that it only operates with a
  BaseIntervalSet instance
* Modified IntervalSet.symmetric_difference_update so that it uses only
  IntervalSets as operands
* Modified add so that it no longer recursively adds IntervalSets
* Modified remove so that it no longer recursively removes IntervalSets
* Modified | and + so that only IntervalSet operands are used
* Modified symmetric_difference so it operates on IntervalSets only
* Modified union so it only operates on IntervalSets
* Modified & and intersection so they only operates on IntervalSets
* Modified - so it only operates on IntervalSets
* Modified ^ so it only operates on IntervalSets
+ Added BaseIntervalSet support for len(s).  It returns the number of
  intervals in the BaseIntervalSet.
* Modified BaseIntervalSet.__init__ to take an iterable object instead of an
  arbitrary number of arguments
* Modified union, intersection, difference, symmetric_difference, issubset,
  and issuperset to accept any iterable object
* Modified update, intersection_update, difference_update, and 
  symmetric_difference_update to accept any iterable object
* Fixed bug where a < b and b > a returns true if a == b

Changes since 0.1:
* iset module was renamed to interval
* ISet class was renamed to IntervalSet
+ Added BaseIntervalSet and FrozenIntervalSet
+ Added the Smallest and Largest classes
+ Added the constant inf
* Moved ne, lt, le, gt, ge, incInterval, exInterval, and between to 
  better-named class methods
* Moved all and empty to classmethods in BaseIntervalSet
- Removed eq
+ Added all as classmethod to Interval
- Removed Interval.__cmp__
+ Added Interval.comesBefore
* Renamed Interval.lbound to Interval.min
* Renamed Interval.linc to Interval.mininc
* Renamed Interval.ubound to Interval.max
* Renamed Interval.uinc to Interval.maxinc
+ Added __hash__ functions
+ Added BaseIntervalSet.__lt__
+ Added BaseIntervalSet.issubset
+ Added BaseIntervalSet.issuperset
+ Added BaseIntervalSet.union
+ Added BaseIntervalSet.intersection
+ Added BaseIntervalSet.difference
+ Added BaseIntervalSet.symmetric_difference
+ Added BaseIntervalSet.copy
+ Added IntervalSet.update
+ Added IntervalSet.intersection_update
+ Added IntervalSet.difference_update
+ Added IntervalSet.symmetric_difference_update
+ Added IntervalSet.discard
+ Added IntervalSet.pop
+ Added IntervalSet.__iter__
+ Added IntervalSet.clear
* Renamed IntervalSet.append to IntervalSet.add
+ Added IntervalSet.remove