p2p.md

added p2p function:

• greenworks.sendP2PPacket(steamId: string, sendType: eP2PSendType, data: Buffer,nChannel:number): boolean
• greenworks.isP2PPacketAvailable(nChannel:number): number
• greenworks.readP2PPacket(size: number,nChannel:number):{data: Buffer,steamIDRemote: string}
• greenworks.acceptP2PSessionWithUser(steamId: string): void
• greenworks.getP2PSessionState(steamIDUser: string): {result:boolean,connectionState:Object}
• greenworks.closeP2PSessionWithUser(steamIDUser: string): boolean
• greenworks.closeP2PChannelWithUser(steamIDUser: string, nChannel: number): boolean
• greenworks.isBehindNAT():boolean

added enum eP2PSendType on types

added event p2p-session-request,p2p-session-connect-fail

Steam docs