Allow SkyCoord input as a numpy array
Mostly finished skycoord initialization docs
Add reference to angle creation section
Allow SkyCoord input as a numpy array
Finish up SkyCoord related updates
PEP8 fixes
Update SkyCoord docstring
Fix typo in SkyCoord docstring
Added astropy-helpers to RTD pip requirements
Remove bdist_dmg functionality since .dmg disk images are no longer a commonly used installation mechanism.
Added note that setup_helpers and version_helpers, and astropy_test class have been moved to astropy-helpers.
Added README.md about astropy.sphinx removal
Added CHANGES.rst entry
Updated message following @eteq’s suggestion
Re-wrote frame documentation
Merge pull request #2554 from astrofrog/added-deprecation-notes-helpers

Added notes about removal of files/packages due to them being moved to astropy-helpers
Merge pull request #2520 from bsipocz/coordinates_accept_space_separator

Make coordinates accept sign separator
Tweaks to consistent-ify the sgr-example with some recent changes
Merge pull request #2544 from mdboom/unit/performance2

Performance improvements for astropy.units
Added changelog entry for #2544

[ci skip]