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**Improvements**
- Add ``PeriodInstancesAPI.relative()`` for relative queries
- Add ``modified-at-latest`` parameter for ``eq.instances.relative()``
- Implement absolute forecasts for instances ``eq.instances.absolute()``
- Add ``unit`` and ``denominator`` attributes to ``Series`` and ``OHLCList``
- Add support for unit conversion when loading data from the API
- Add ``curve_type`` parameter for ``eq.metadata.curves()``
- Add ``Subscription``, ``SubscriptionAccess``, ``SubscriptionType`` and
``SubscriptionCollectionPerm`` models
- Add ``Curve.subscription`` field, providing the user with subscription
information for curves
- Add ``User``, ``Organization`` and ``AccountManager`` models
- Add ``UserAPI`` and ``eq.user.user()`` to get details of the current user
**Bugfixes**
- Remove unnecessary limitation from ``eq.instances.relative()`` for parameters
``time_of_day``, ``after_time_of_day`` and ``before_time_of_day``
**Breaking changes**
- Removed ``Place.area``. Use ``Place.areas`` instead.