Don't use EN dash to fix doc build

Author: ddeboer

Resources/doc/conf.py

@@ -49,7 +49,7 @@
 
 # General information about the project.
 project = 'FOSHttpCacheBundle'
-copyright = '2014–2015, David de Boer, David Buchmann'
+copyright = '2014-2015, David de Boer, David Buchmann'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the