Release 0.0.22

+ Fixes a couple of issues around arrays and their validation.
  As a result of these fixes, you can now have objects that can
  be *either* arrays or other types (using 'oneOf') and it will
  work

Version 0.0.22-1

+ Fixes a bug where null values threw an error when being set
  because their type wasn't properly defined.

Version 0.0.21

Removes dependency on jsonpointer and jsonpatch, which
were never actually used anywhere but showed a remarkable
propensity to screw up installs.

Bumped a full minor version number just to avoid screwing
up anyone pinned to 0.0.20

Hotfix 0.0.20-1

+ Fix a bug where accessing a defined but non-existent attribute
  would incorrectly throw an AttributeError stating that the
  attribute wasn't valid

Version 0.0.20

+ Adds support for `oneOf` in array `items` definitions
    + This the the pattern where an array can have multiple differnt
      types, but from a restricted set. Required setting up a TypeProxy
      object to validate array types.

+ Fixes bug cwacek#39 where array item references weren't resolved generally. h/t @blr246

Merge pull request cwacek#42 from farshidce/issue41-fix

fix-cwacek#41 : lazy_format __str__ function should return the formatted string

Version 0.0.19

+ Replaces all noseOfYeti tests with py.test tests
+ Fixes cwacek#37 (h/t @lockie)
+ Resolves cwacek#34 by enabling deletion of properties.

Version 0.0.18

+ Adds support for bare oneOf properties (i.e. schemas which
  just use 'oneOf' with a couple references at the top level).
+ Add readthedocs documentation.

Fix typo in requirements file

0.0.18-2

+ Fix a regression where LiteralValue objects weren't converted
  to dictionaries properly