* Added new hooks 'EnhancedChangesListModifyLineData' &
'EnhancedChangesListModifyBlockLineData', to modify the data used to build
lines in enhanced recentchanges and watchlist.
+* Caches that need purging ability now use the WANObjectCache interface.
+ This corresponds to a new $wgMainWANCache setting, which defaults to using
+ the $wgMainCacheType settings.
+* Callers needing fast light-weight data stores use $wgMainStash to select
+ the store type from $wgObjectCaches. The default is the local database.
==== External libraries ====
* Update es5-shim from v4.0.0 to v4.1.5.