[svn r330] Implemented synchronized statements.

Changed the tryfinally handlers to a more generalized EnclosingHandler.
Changed ClassInfoS to be mutable so they can be used as locks.
Added new BB after throw ala return/break etc.

ir/irfunction.h

@@ -25,10 +25,7 @@ struct IrFunction : IrBase
     llvm::AllocaInst* srcfileArg;
     llvm::AllocaInst* msgArg;
 
-    bool inVolatile;
-
     IrFunction(FuncDeclaration* fd);
-    virtual ~IrFunction();
 };
 
 #endif