Astroplan

----------------

- Fix compatibility with Astropy 4.X

----------------

- Added documentation for reproducing MMTO sun rise/set times [434]

- Deprecation of ``MAGIC_TIME`` variable, which used to be returned for targets
that don't rise or set [435]

- Replace deprecated astroquery service [431]

- Fix for the broken IERS patch [418, 425]

- Add ``GalacticLatitudeConstraint`` to constrain the galactic latitudes of
targets. This can be useful for planning surveys for which crowding due to
Galactic point sources is an issue. [413]


- Add ``n_grid_points`` keyword argument to rise/set/transit functions which
allows usersto trade off precision for speed. [424]

----------------

- ``observability_table`` now accepts scalars as ``time_range`` arguments, and
gives ``'time observable'`` in this case in the resulting table. [350]

- Bug fixes [414, 412, 407, 401]

----------------

- Added new ``eclipsing`` module for eclipsing binaries and transiting
exoplanets [315]

- Fixes for compatibility with astropy Quantity object updates [336]

- Better PEP8 compatibility [335]

- Using travis build stages [330]

----------------

- ``Observer.altaz`` and ``Constraint.__call__`` no longer returns an (MxN) grid
of results when called with M ``target``s and N ``times``. Instead, we attempt
to broadcast the time and target shapes, and an error is raised if this is not
possible. This change breaks backwards compatibility but an optional argument
``grid_times_targets`` has been added to these methods. If set to True,
the old behaviour is recovered. All ``Observer`` methods for which it is
relevant have this optional argument.

- Updates for compatibility with astropy v2.0 coordinates implementation
[311], updates to astropy-helpers [309], fix pytest version [312]

------------------

- Internal changes to the way calculations are done means that astropy>=1.3 is required [285]

- Fixed bug when scheduling block list is empty [298]

- Fixed bug in Transitioner object when no transition needed [295]

- Update to astropy-helpers 1.3.1 [294] and compatibility fixes for astropy 1.3 [283]