Merge pull request #955 from dstansby/0152-clog

Add 0.15.2 changelog

Author: dstansby

CHANGES.rst

@@ -1,3 +1,10 @@
+HelioPy 0.15.2 (2020-12-23)
+===========================
+Bug fixes
+---------
+- Fixed a bug in :file:`setup.py` that prevented HelioPy from being installed
+  on other readthedocs projects.
+
 Heliopy 0.15.0 (2020-10-17)
 ===========================
 
@@ -8,7 +15,7 @@ Features
   a `~heliopy.spice` object. (`#938 <https://github.com/heliopython/heliopy/pull/938>`__)
 - The classes in `heliopy.data.spice` have been updated, to allow for different
   types of SPICE files:
-  
+
   - All kernels are now derived from `KernelBase`.
   - SPK kernels have their own class, `SPKKernel`.
   - Calling `Kernel` will automatically detect and create the appropriate kernel