Add Miasmata Map Fixes

These fix a couple of errors on the map - removed urns that don't exist
and fixed some cut off camp icons.

I actually made these last year, but haven't distributed them due to
their size and the fact that bundling them in anything other than
main.rs5 would cause Miasmata to crash on launch. Now that miaspatch is
on the way to address that issue it's time to finally release them ;-)
Remove community patch assets from translation staging area

MiasPatch will be bundled with the community patch and translation
patch, so there won't be a need to stage the modified Map_FilledIn with
the translation files any more.

This will have the slight disadvantage of making the patch a bit larger
as it will contain two copies of Map_OverlayInfo (English & French), but
it still seems like the most sensible approach to me.