[WIP] Support HD Edition 5.0 (and Rise of the Rajas), closes #40

[goto-bus-stop]

Closes #40 Closes #27 Closes #19

So far:

• Adds resources for new civilizations
• Adds terrain colours for the new terrains
• Reads player info blocks (starting location, starting units, …)

To do:

• [x] ~Read the map data. This seems to be stored very differently from 4.7 and below.~ they aren't
• [x] Read the game settings. I thiiiink most of these were removed from the recorded game body, but they can be read from the aoe2record header instead.
• [ ] More??