FIX Limit ExtraMeta to only allow meta and link elements
Merge pull request #943 from hafriedlander/fix/extrameta_whitelist

FIX Limit ExtraMeta to only allow meta and link elements
Merge branch '3.1' of git://github.com/silverstripe/silverstripe-cms into 3.1
FIX: Only allow subclasses of the tree_class to be created by getNewItem()