Object contract methods implementation

Added:

• toString(), equals(Object), hashCode() method implementation
• @Style annotation for defining names fofr custom toString(), equals(Object), hashCode() methods
  Changes:
• From ProxyMethodInvoker#invoke(Object, Method, Object[], Object) to ProxyMethodInvoker#invoke(Object, Method, Object[], Map<String, Object>)
• All printStackTrace() occurrence replaced by throw new RuntimeException()
  Code example:
  Before:

@ConfigInterface
public interface Human {
    String name();
}

public class Main {
   public void print(Human human) {
     if (human != null)
       System.out.println(human); // null
   }
}

After:

@ConfigInterface
public interface Human {
    String name();
}

public class Main {
   public void print(Human human) {
     if (human != null)
       System.out.println(human); // [interface com.some.package.Human]{name="Alex"}
   }
}