#283 Add WP8.1 assemblies to core definition.
#283 Add WP8.1 assemblies to core definition.

MarimerLLC/csla,ronnymgm/csla-light,JasonBock/csla,JasonBock/csla,jonnybee/csla,jonnybee/csla,rockfordlhotka/csla,jonnybee/csla,MarimerLLC/csla,rockfordlhotka/csla,rockfordlhotka/csla,MarimerLLC/csla,ronnymgm/csla-light,JasonBock/csla,BrettJaner/csla,BrettJaner/csla,ronnymgm/csla-light,BrettJaner/csla