Upload/Download RAW

As of 0.6.2 terrain upload and download thru the estate management tab works, with these caveats:

• You need to upload a terrain at least once before downloading it, otherwise the client will crash. This could be because there might be some problem with the first, initial, default island. See the mantis for this.
• The client might crash on first upload anyway, but on subsequent uploads, it works.
• In grid mode, you need to be "estate owner" for the region in order to upload/download, as the "estate owner" setting overrides the "region owner" setting.
• So, we have to create separate estates for the regions where terrain should be uploaded/downloaded by other people than the 'main' estate owner. This is not really a problem, but means 'estate managers' will have to be re-added to those. (If and when we fix the estate management propagation, we should also finalize the partially implemented 'child estate' concept)
• Uploading takes a fair amount of time (2 minutes or more) and downloading even more (5-10 minutes or more) under which time you really shouldn't move around, close session or teleport.

Related: Terrain_making