v0.1.0, 2013-03-20 -- Initial release

v0.2.0, 2013-03-20 -- First working release.
- Fix broken import statements from 'lcda' project.
- Basic package setup files.
- Apply X11 ("MIT") license.

v0.2.1, 2013-03-27 -- 'process' parameters
- Alter 'IOProcess.process' parameters for simplicity. This change is not
  backwards compatible.
- Add tests for 'tspecs_from_callable' function.
- Add 'IOProcessFailureError', 'combine_tspecs' to package-level namespace.

v0.2.2, 2013-03-30 -- iomanager
- Rename package to 'iomanager'.
- Add 'IOManager' class.
- Break 'IOProcessor.process' method into separate 'coerce', 'verify' methods.
- Coercion no longer raises any errors. Remove 'TypeCoercion...' errors.
- Rename 'IOProcessFailureError' to 'VerificationFailureError'.
- Add type-checking errors 'TypeCheckFailureError', 'TypeCheckSuccessError'.

v0.3.0, 2013-04-02 -- Stable
- First release suitable for dependency.
- Add support for non-container-type iospecs, iovalues.
- Add support for tuple-type iospecs, iovalues.
- Add README text explaining how to use this package.
- Change 'default' things to 'json' things. They were always intended to be JSON
  tools, so now their names reflect that. Move JSON tools into 'json_tools'
  module.
- Completely refactor tests.

v0.3.1, 2013-04-05 -- Calling semantics
- Change calling semantics. 'iospec' values ('required', 'optional', 'unlimited')
  are now passed to the 'IOManager' or 'IOProcessor' constructor, and only the
  'iovalue' value is passed to the 'verify' and 'coerce' methods.
- Default values can be set with class attributes.

v0.3.2, 2013-04-07 -- Input/Output verification errors
- Coercion must now have two parameters: 'value' and 'expected type'. This allows
  for re-usable coercion functions that can be applied to more than one type.
- Create separate errors for input and output verification. Both errors inherit
  from 'VerificationFailureError':
  - InputVerificationFailureError
  - OutputVerificationFailureError

v0.3.3, 2013-04-09 -- Error messages
- Add appropriate error messages for VerificationFailureError. Messages can be
  customized by user.

v0.3.4, 2013-04-12 -- Fixes
- Fix a few lingering organizational issues.
- 'iospecs_from_callable' accepts non-function callable objects.

v0.3.5, 2013-04-29 -- 'web_tools'
- Rename 'json_tools' module to 'web_tools'.
- 'web_tools' input coercion functions all coerce string values to the expected
  types. This behavior handles string input values from POST, GET, etc. data.
- Add coercion functions for numeric types 'bool', 'int', 'float'.