Drop Python 3.3 support.
Include license file in wheel.
Port most tests from nose/unittest to pytest, add Travis CI and coveralls.
Update package meta data, tag python 3.6 support.
Let the graphviz-method pass kwargs to the returned graph (e.g. format=’png’).
Relax optional graphivz dependency to < 1.0.
Added extended Sphinx-based documentation.
Added move_object and move_property to definitions.
The take-method of definitions now supports skipping all objects or properties when called with empty iterables (default None means include all).
Simplified __getitem__ examples.
Fixed a possible encoding issue with tofile().
Visualize more examples.
Added tests for formats dump/load file roundtrips.
Changed context __eq__ test with non-contexts from TypeError to NotImplemented.
Fixed non-working augmented assignment operators on definitions. Simplified definition implementation.
Added context definition objects, allowing interactive building, modification, and combination of context creation arguments.
Added include_unary option to logical connectives calculation.
Made derivation code more explicit. Subset test replaced by inlined implementation using only bitwise_and.
Changed context._lattice to a generator.
Fixed failure to handle contexts with single object/property.
Improved context/lattice division of labour: context now computes all concepts with their covering relation, while lattice only builds/decorates the object- based representation.
Improved context and bitset interface used by lattice (reduce_and, reduce_or). Added doubleprime method to extents and intents. Added raw option to intension, extension, and neighbors method of context.
Added EXAMPLE context for repl experiments.
Context relation now omits orthogonal pairs in __str__().
Fixed CSV export with Python 3.3+.
Added Python 3.3+ support.
Set default UTF-8 encoding in context tofile().
Switch setup.py dependencies to version ranges.
Changed attributes to return a generator instead of a list.
Upset and downset of concept object now are iterable-returning methods instead of properties (backwards incompatible).
Changed concept object minimal generating properties to be computed on request instead of being precomputed during lattice build; changed minimal and attributes from properties to methods (backwards incompatible).
Improved unicode support.
Changed pickling of lattice and concepts.
Changed ordering of downset and lower_neighbors to longlex.
Add context file csv format.
Added newline normalization to context file loading.
Update bitset dependency to 0.5 (better neighbors).
Backwards incompatible: removed underscore from (from|to)_(string|file) method names.
Update graphviz interface dependency to 0.2 (UTF-8 support) with changed api.
Support empty iterables in Lattice join and meet.
Simplified graphviz quoting.
Added loading and dumping of contexts and include some example cxt files.
Make context objects pickleable.
Context and lattice methods no more implicitly split string arguments.
Switch to standalone graphviz interface implementation.
Refine packaging info.
Account for bitsets internal api change.
Switch to standalone bitsets implementation.
First public release.