Change developing group to developer group

Author: birgits

doc/conf.py

@@ -61,7 +61,7 @@
 # General information about the project.
 project = u'windpowerlib'
 copyright = u'2016, oemof developer group'
-author = u'oemof developing group'
+author = u'oemof developer group'
 
 import windpowerlib
 
@@ -285,9 +285,9 @@
 
 # Bibliographic Dublin Core info.
 epub_title = u'windpowerlib'
-epub_author = u'oemof developing group'
-epub_publisher = u'oemof developing group'
-epub_copyright = u'2016, oemof developing group'
+epub_author = u'oemof developer group'
+epub_publisher = u'oemof developer group'
+epub_copyright = u'2016, oemof developer group'
 
 # The basename for the epub file. It defaults to the project name.
 #epub_basename = u'pahesmf'