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/types.h

@@ -17,7 +17,6 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-
 #if !defined(TYPES_H_INCLUDED)
 #define TYPES_H_INCLUDED
 
@@ -51,6 +50,7 @@ typedef uint64_t Key;
 // Bitboard type
 typedef uint64_t Bitboard;
 
+#include <cstdlib>
 
 ////
 //// Configuration