Don't use backward slashes in filenames

This fixes an issue where images would not show up on other OSses than
Windows (such as Linux-based systems)
Merge pull request #14 from avans-os/LobbyCrossPlatformImageRefs

Don't use backward slashes in filenames
Added the diffrent views for the lobby. Added mvc compatibility with a
added model and controller
Merge remote-tracking branch 'origin/development-master' into
Lobby-screen-upgrade

Conflicts:
	DeSlimsteMens/src/view/Lobby.java
Merge pull request #16 from avans-os/Lobby-screen-upgrade

Lobby screen upgrade
Merge branch 'development-master' of
https://github.com/avans-os/DeSlimsteMens into development-master

Conflicts:
	DeSlimsteMens/src/main/Main.java