convert_functions.py no longer hardcodes acceptable LOT_ values
Added characters.h and surface_collision.h to convert_structs.py
Prevented mod filenames with a slash in it from being considered acceptable
Sanitized mod filenames when received from the server
Mods are now loaded into a table
Clients now request a mod list from the server, then download each file one at a time before joining
Embedded constants.lua into the program