Translation support

[IlDucci]

(Pinging @NPi2Loup in particular, as they seem to be the actual maintainer of this mod)

At its current state, all changes and improvements added for VR have been stuck into English-only. While I can do a few things, coding is something that escapes my current knowledge. Anyway, these are the elements that I have seen at a glance:

• Every new VR setting added to the main menu is hardcoded and should be exported to the strings dictionary file. A new lang file can be added to avoid adding the entire string table (you could call the file englishVR.lang, frenchVR.lang, spanishVR.lang, etc.). Affected files are in neo\d3xp\menus\MenuScreen_Shell_Settings.cpp and it's cronies at \neo\d3xp\menus\MenuScreen_Shell_VR_XXXX.cpp . I'm going to try something with a fellow modder.
• The lookforward.tga file is a single baked texture with English texts. While the texture is used to detect if the VR mod exists, I think the contents should be replaced with something without texts, so the actual screen displayed ingame is a GUI or a modern SWF file with additional text displayed, taken from the string dictionary file.
• The new FlickSync feature has the texts, again, hardcoded. This file would require an external dict file, just like what was done with the voice.dict file.
• The voice.dict file could also be localizable, instead of just having to replace the English dict file with a Spanish one? This one's a weird one.