ORS Resource Fixes

This fixes three of the dumb, obvious issues that ORS has.

* The first one, a minor issue, is fixing the way it displays resource concentrations in the scanner context menu.

* The next, a major one, is preventing duplicate resource info keys from being added to the map dictionary. This solves, or at least reduces the effect of the duplicate resource problem. It will only load the first config that it comes across, but at least it won't implode if people put two resources with the same name in.

      - I also made sure that loading only takes place once per planet; if something goes wrong, repeatedly loading info from the configs is unlikely to fix it.

* The third issue, another major one, but somewhat harder to come across, is the problem of texture managing mods making the map textures unreadable. This isn't a great solution, it just tests the texture to make sure it can be accessed using the same method that other ORS functions use. If it doesn't work it just skips the rest of that resource config and moves on to the next.