The game will now autodetect if it should run in shareware mode or full
retail based on the found mpq file. Additionally it can beforced in the
shareware mode with --spawn even if the retail data is found.
This simplifies a lot of the spagetty code and lets us better refactor,
also worth noteing is that we won't have to setup a secound set of build
tests.
Finished refactoring spells.cpp, modifying other files only as needed.
Some functions are 99% binary exact now, like PlacePlayer, for example.
Added notes/TODOs for places with remaining discrepancies.