Support displaying different contracts/target images depending on gameversion

[suanjiansalt]

What
From H2016 to H2 and H3, images of some (Elusive Target) missions have been changed, including:

• The Sensation (changed in H3)
• The Identity Thief (changed in H2)
• The Chef (changed in H3)
• The Food Critic (changed in H3)
• The Chameleon (changed in H2)
• The Warlord (changed in H3)
• The Badboy (changed in H3)
• The Undying Returns (changed in H3?)

Their challenges should be taken into consideration too.

Why
As official does.

[RDIL]

I honestly think this is fine the way it is - the new images look great, even in the older engine versions.

[suanjiansalt]

I honestly think this is fine the way it is - the new images look great, even in the older engine versions.

Yes, the new images show the progress of IO's aesthetics. But in my humble opinion these images are a bit too vibrant and don't quite fit in with the overall stylistic grey and white atmosphere of 2016.

[AnthonyFuller]

Lets get this in for v8. Although you can install the Offline Image Pack mod for both of those versions (H2016 or H2) to get the proper engine-specific images.

[suanjiansalt]

The question is, in which paths do we save these alternative images.