0.5 (unreleased)

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

0.4 (2017-10-23)

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]

Fixed bug arising from changes to distutils.ConfigParser [#177, #187, #191]
Removed the sites module from astroplan, since it was ported to astropy [#168]
Removed dependence on PyEphem, now using jplephem for the solar system ephemeris [#167]
New API for scheduling observations (still in development)
New plot_finder_image function makes quick finder charts [#115]
Updates to astropy helpers and the package template [#177, #180]