Add an enum to represent building bays

[Brett208]

Closes #19

I didn't follow the filename prefix of "Enum" used in 2 other enum header files as I do not prefer it, or would more prefer it as a suffix. Wanted to point it out in case it wasn't obvious that it varied.

[DanRStevens]

I was thinking about the enum header naming recently. We are not entirely consistent with this.

There is a NonExportedEnums.h header, with other similar constants. I was thinking the new enum could have fit well there, however, when I went looking for it I realized it was in the Outpost2DLL project. That's actually probably the wrong place for that header. Those enums aren't actually exported names. They're completely made up. It probably makes more sense to put that in OP2Helper, given the division of responsibilities.

Or maybe OP2Helper should be merged with Outpost2DLL, perhaps as it's own subfolder. Some of the things provided by OP2Helper are pretty basic, and pretty closely tied to how the game works, particularly in regards to the enums describing built in constants.

At any rate, the header organization, and project organization are perhaps higher level concerns best dealt with in their own issue.

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Given the other concerns, I'm not too picky about the name. It might be better with "enum" in there somewhere. In regards to the NonExportedEnums.h header, I always have trouble finding it, because I can never remember the name, only that it has "enum" in it. I've been recently tempted to rename it so "enum" appears at the start, making it easier to find. However, a deeper problem might simply be that it's a bad name, rather than the order of where to place "enum".

I'm happy to defer on file naming issues.

[Brett208]

OK, thanks for the comments. Lets open an issue or 2 for what you discussed.

-Brett

[Brett208]

Also, I tacked Enum on the end of the filename to ease finding the filename as suggested.