PlayerInfo functionality

[kunalpowar]

• also added a few glogs to enable debugging

[kidoman]

MarshalBinary is from http://tip.golang.org/pkg/encoding/#BinaryMarshaler

[kidoman]

the A2SPlayerRequest should be instantiated with the ChallengeResponse, and not passed to this method

[kunalpowar]

Get the marshalBinary part. But Why should A2SPlayerRequest know Challenge Response. It is built using a challenge Response. The request itself need not have the challenge as a separate entity. In fact the first implementation had something like

type A2SPlayerRequest struct {
c ChallengeResponse
}

[kidoman]

thanks for the PR. we definitely needed this

• the glog changes to the existing code should be a separate PR
• a lot of things are wrong with the code in the PR, please have a look

[kunalpowar]

Thanks for the feedback. Am still in progress of cleaning up the code. Will solve the issues you pointed out.