Origo-sdk-python

Breaking

* Modules reorganized to leave top level `origo` namespace empty, all modules
are now under `origo.sdk`. Ie. `from origo.data.upload import Upload` now
becomes `from origo.sdk.data.upload import Upload`. This allows other
packages to add their modules under the `origo` namespace.

* Support the new status API response format. This affects the upload command
response, now returning a `trace_id` key instead of `status`.

* `PipelineInstance` now takes an optional parameter `pipelineProcessorId`,
intended to supersede `pipelineArn` once all users have been updated. The
`pipelineArn` parameter is now optional.

* The `taskConfig` to `PipelineInstance` is now also optional.

* `PipelineInstance` no longer accepts the obsolete parameters `schemaId`,
`transformation`, and `useLatestEdition`.

* Enable, disable and get event stream sinks by *type* (not id).

* Add function for listing webhook tokens for a dataset.

* Rename event stream methods:
* `enable_subscribable` > `enable_subscription`
* `disable_subscribable` > `disable_subscription`
* `add_sink` > `enable_sink`
* `remove_sink` > `disable_sink`

* Add event stream API support.