Added image support

[spj2401Dev]

Hi,
For a game with friends, I wanted to extend the game a bit to be able to include pictures, to have a braughter catalogue of clues. Now you can specify an image source for each clue.

A clue with an image will now look something like this

I appreciate your efforts on this project, and perhaps this is something worth adding to the project.

[sophxreg-cmd]

hey! this looks awesome. would it be possible to add images to the solution too?

[spj2401Dev]

How about some sort of "game bundle" which is a zip file which includes the .json and the images. Then I can load them either externally or load them from this game bundel. Let me go implement that real quick

[spj2401Dev]

So just pushed changes which now allow you to create as mentioned "Game Bundels". Basically you put your game.json and a images folder into a zip archive and upload. In your game.json you can access files in that Game Bundle via the $ operator. So you can do $images/Picture1.jpg.
I added it to my fork and added it to this PR, but you will probably need to grab this off my fork since this project seems pretty dead.

[sophxreg-cmd]

thank you!!