Added CTW Tyrsus

Added CTW Map: Tyrsus to Nebula. Also added all files for it. Map.yml
isn't done yet.
Updated Travincal II

Updated all files in Nexus -> Travincal II
Added Special-Box

Added all files in Nexus -> Special-Box.
map.yml still missing
Updated Travincal-I

Updated Nexus -> Travincal-I.
Screenshots are still missing.