Added GameModeName to Scene
Added function to get number of active scenes
Added logic to level/client loading to enact gameplay mode logic driven by either Scene's GameModeName or project setting's default game mode
Added template module.cs file for module creation and adjusted new module logic in AssetBrowser to create off template
Updated FPSGameplay code to have deathmatchGame mode work with new GameMode logic
Updated EmptyLevel scene to define deathMatchGame as gamemode
Updated FPSGameplay module script to properly client/server initialize
This makes some tweaks to the engine to support this, specifically, it tweaks the hardcoded shaderpaths to defer to a pref variable, so none of the shader paths are hardcoded.
Also tweaks how post effects read in texture files, removing a bizzare filepath interpretation choice, where if the file path didn't start with "/" it forcefully appended the script's file path. This made it impossible to have images not in the same dir as the script file defining the post effect.
This was changed and the existing template's post effects tweaked for now to just add "./" to those few paths impacted, as well as the perf vars to support the non-hardcoded shader paths in the engine.
