Added fish-net networking solution

fish-net is a free resource for implementing multiplayer games with easy integration and a handy documentation

Author: Yash-Punia

README.md

@@ -135,6 +135,7 @@ Navigation:
 * [UNet Authoritative Networking](https://github.com/atrakeur/unity-unet-authoritative-networking) - authoritative networking implementation.
 * [MLAPI](https://github.com/MidLevel/MLAPI) An alternative to Unity's UNET high level API, allows for separate server/client projects and more.
 * [Barebones Master Server](https://github.com/alvyxaz/barebones-masterserver) - Host your own custom master server setup, avoid CCU fees.
+* [Fish-Net](https://github.com/FirstGearGames/FishNet) - free networking solution built from ground up with synchronization of states and logic 
 
 ## VR
 * [SteamVR](https://github.com/ValveSoftware/steamvr_unity_plugin) - VR SDK.