Merged CI and CMake config from master
Merged CMakeLists.txt from master
Merge branch 'server' of https://github.com/msiemens/UH-INF-StrategicGame into server

Conflicts:
	CMakeLists.txt
Client updated. Added Show-Server-Online.
!Forget this!
Created a bigger map. Movefunction not finished.
Unused files deleted.
client update. CamMove added.
GameMap updated: TileSize=20px and GameEntities are fixed.
!Forget this!
Copy class GameMap into gamemodel.
added GUI. some other functions.
test
Added Timer-class.
Updated CI configuration to include SDL_TFF
Fixed typo in CI config
Merged network, gamemodel
Enabled messages from server to client
!forget this!
Merged network