Remove hardcoded file paths for initSubsystem

[alanblack166]

Game definitions are read from .ini files. A subsystem is created by parsing .ini files, and a large number of these subsystems are hardcoded to look for specific paths.

Example line 464 in GameEngine.cpp:

initSubsystem(TheWeaponStore,"TheWeaponStore", MSGNEW("GameEngineSubsystem") WeaponStore(), &xferCRC, NULL, "Data\\INI\\Weapon.ini");

For modding, this presents an issue: Instead of being able to add only the necessary definitions for a new unit (ArmorSet, Locomotor, Weapon, OCL, etc.) in a single file, the modder is forced to have complete copies of each hardcoded .ini file that they alter, bloating file size and forcing them to rebase their mod or patch if the main game/mod files are changed.

[xezon]

One way to deal with this is introducing magical folders for "Weapon", "Armor", etc, where multiple INI files can be placed into the folders.

Another way is adding a new INI file that acts as a registry where all the Subsystems are linked to custom INI files.

[xezon]

One way to deal with this is introducing magical folders for "Weapon", "Armor", etc, where multiple INI files can be placed into the folders.

This was stupidly easy to do and is working.