Sort mod versions properly

[Forkk]

Currently the mod page just lists versions in whatever order they're listed in the JSON file. They should probably be sorted instead.

[Forkk]

A potential problem with this is mods with weird versioning schemes (and especially mods which change versioning schemes between versions). This isn't an issue when sorting by Minecraft version, but could be problematic for sorting mod versions within a Minecraft version.

[LostOfThought]

We possibly could have a standardized versioning scheme for the meta. Heck, even an approximate UNIX timestamp could work.

[Forkk]

I'd rather use the mod's own version scheme. I'm thinking we probably won't sort mod versions within each Minecraft version. The order they were released in should be indicated by their order in the list.

Of course we can still sort the Minecraft versions on the page.