Update .w3i Info file parser

[Luashine]

The Map info file has been fully documented now, format versions 0-31. The missing legacy pieces are ROC Beta 100 (the first one).

• PR: ChiefOfGxBxL/WC3MapSpecification/pull/7
• Until merged, available on my fork

After implementing this, you'll be able to correctly read the info of ROC/TFT Beta maps.

---

This would be a total rewrite of the hardcoded W3I.java