Retire Application class

It is a redundant boiler plate, just call initialization and
resource release directly from main()

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/tt.cpp

@@ -70,7 +70,7 @@ void TranspositionTable::set_size(size_t mbSize) {
       {
           std::cerr << "Failed to allocate " << mbSize
                     << " MB for transposition table." << std::endl;
-          Application::exit_with_failure();
+          exit(EXIT_FAILURE);
       }
       clear();
   }