Oblivion Remastered Support

[Silarn]

Adding interfaces for VFS mod mapping updates (used to get Oblivion Remastered to map to multiple locations).

• modDataDirectory defines mod directory that maps to 'Data'
  • This is used to tell the main interface where to look for 'Data' files and defaults to the root directory
• getModMappings allows mapping directories to multiple locations
  • This contains mod subdirectory -> VFS directory mappings (where the VFS mappings can be a list of locations)
  • By default, will map the root mod directory to the game 'data' directory (and any secondary data directories if defined)
  • Oblivion Releloaded maps 'Data' to the game Data, 'Paks' to the game Paks\~mods, 'OBSE' to the root OBSE directory and so on.