Adding trivial security policy

This commit simply add some policy rules to the project. Since the
policy file grant all permission it's frivolous somehow.
Adding functionality of huntFly

Update the first version of huntFly. This is implemented by the
synchronized method and a lock which will be incremented by one on any
threads which failed to catch the fly. This works fine with 2 instance
situation. This should not work on multiple(more than 2) players
scenerio.

Signed-off-by: Chen, Yiqun
Apply reliable synchronization

The modified codes apply the try lock mechanism to ensure the lock won't
be hold for long. Once the attempt to acquire lock fails the tryLock()
returns immediately. So we can force the players who failed to access
the lock to quit ASAP and left all refresh works to the thread which
successfully holds the lock.

Signed-off-by: Chen, Yiqun