unset irradiance.py and test_irradiance.py executable bits (#461)

* unset irradiance.py executable bit

* add 0.6.0 to whatsnew.rst

* fix typo

* and test_irradiance.py

Author: wholmgren

docs/sphinx/source/whatsnew.rst

@@ -6,6 +6,7 @@ What's New
 
 These are new features and improvements of note in each release.
 
+.. include:: whatsnew/v0.6.0.rst
 .. include:: whatsnew/v0.5.2.rst
 .. include:: whatsnew/v0.5.1.rst
 .. include:: whatsnew/v0.5.0.rst

docs/sphinx/source/whatsnew/v0.6.0.rst

@@ -0,0 +1,30 @@
+.. _whatsnew_0600:
+
+v0.6.0 (___, 2018)
+---------------------
+
+API Changes
+~~~~~~~~~~~
+
+
+
+Enhancements
+~~~~~~~~~~~~
+
+
+Bug fixes
+~~~~~~~~~
+* Unset executable bits of irradiance.py and test_irradiance.py (:issue:`460`)
+
+
+Documentation
+~~~~~~~~~~~~~
+
+
+Testing
+~~~~~~~
+
+
+Contributors
+~~~~~~~~~~~~
+* Will Holmgren