DOC: update copyright year in doc config

Preparing for release

Author: matthew-brett

doc/source/conf.py

@@ -83,7 +83,7 @@
 
 # General information about the project.
 project = u'NiBabel'
-copyright = u'2006-2015, %(MAINTAINER)s <%(AUTHOR_EMAIL)s>' % rel
+copyright = u'2006-2016, %(MAINTAINER)s <%(AUTHOR_EMAIL)s>' % rel
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the