Consider putting some features gameside

[sprunk]

Consider adding some of the commonly used trees, rocks etc gameside. Reasoning:

• maps won't need to individually include a copy in each map -> consistency, ease of distribution, less disk use
• if you load up a map editor (say SpringBoard-ZK) you'll be able to Just Place Them™ as opposed to somehow learning that you can even add your own features in the first place, knowing where to obtain them, and then manually adding them to your map while making sure everything is done correctly (sane def, all textures wired up correctly etc)
• BAR bought some rock/crystal model assets for $ and they have to put them gameside for licence reasons, so we may have to do the same to use some BAR maps since the maps don't include the models on their own