- VCMI will load mods from Mods directory recursively. Submods must be
placed into additional Mods directory, e.g.
<data dir>/Mods/<mod name>/Mods/<submod name>
- submods will be loaded only if their parent mod was enabled
- submods namespace for objects will be "<parent mod ID>.<submod ID>"
- TODO: Launcher is not aware of submods yet (seems to be working but
may behave incorrectly)