Further PST integration.
Patch for Andrew Niefer core: Added basic command structure to support rollback to a previous mark. Note that only structural changes are undone in the rollback, that is, adds (addDeclaration, addFriend, addParent, etc) but not sets (setType etc) ui: added ParserSymbolTableTest::testMarkRollback
Patch for Andrew Niefer Here are some initial changes to the symbol table to allow for support templates.
In the "terminate" event handler of the session manager check the targets that belong to the current session.