Member isAdmin no longer available in Silverstripe 3

As the "isAdmin" method is no longer available for the Member class in Silverstripe 3.0 the best way to detect for an admin in the template is now to use the "inGroup" function:

<% if $CurrentMember.inGroup('Administrators') %>

As of Silverstripe 3.0 we can now use apostrophe string literals in function calls.