DataSource Change History

=========================

3.4.0

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### datasource-polling

* `setInterval` fires first `sendRequest` in a 0ms `setTimout`, then

subsequent calls after the configured timeout. [Bug #2529182]

### datasource-function

* success callbacks that throw an error no longer result in the `data` event

being fired again. [Bug #2529824]

3.3.0

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* Bug 2529466: Unanonymize DataSource.IO callback functions.

3.2.0

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* Removed hardcoded DataSource.IO from DataSourceJSONSchema.

* Added ability to cancel underlying IO and Get transactions.

* Better DataSource error handling.

* Added ioConfig Attribute to DataSource.IO.

3.1.1

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* No changes.

3.1.0

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* DataSource's sendRequest() argument signature has changed in a

non-backward-compatible way. It now accepts a single object containing

the properties "request", "callback", and "cfg".

* DataSource.Get bug fixed where it was trying to delete the proxy callback

in the wrong location during cleanup.

* Changed from array of proxy callbacks to object with guid keys to support

services that don't properly handle array indexes in the callback

parameter (Twitter)

* Code reorganized (API and functionality unaffected)

3.0.0

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* DataSource.IO now passes request value to IO.

* DataSource.Function now catches exception and fires error event.

3.0.0 beta 1

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* Initial release.