keyword: offer additional datefilters when the extension is enabled

Before the additional datefilters (utcdate, svnisodate, svnutcdate)
were used when kwtemplater was initialized. Now they always be used
once the extension is enabled.

hgext/keyword.py

@@ -126,6 +126,10 b' def svnutcdate(text):'
     '''
     return util.datestr((text[0], 0), '%Y-%m-%d %H:%M:%SZ')
 
+templatefilters.filters.update({'utcdate': utcdate,
+                                'svnisodate': svnisodate,
+                                'svnutcdate': svnutcdate})
+
 # make keyword tools accessible
 kwtools = {'templater': None, 'hgcmd': ''}
 
@@ -187,9 +191,6 b' class kwtemplater(object):'
                                   for k, v in kwmaps)
         else:
             self.templates = _defaultkwmaps(self.ui)
-        templatefilters.filters.update({'utcdate': utcdate,
-                                        'svnisodate': svnisodate,
-                                        'svnutcdate': svnutcdate})
 
     @util.propertycache
     def escape(self):