NTFS Compress Save Folder

[Eric B Jones]

Performance test NTFS Compression on the SaveGame folder. The goal is to improve autosave performance and reduce file sizes.

This will require the use of FSCTL_SET_COMPRESSION https://msdn.microsoft.com/en-us/library/windows/desktop/aa364592(v=vs.85).aspx

This will not do anything for UNIX users. But hopefully will improve performance for windows users.

We may also be able to work in the check if savegame and save car folders exist stuff

[Eric B Jones]

Ended up saving 40-60% but at the cost of half the write speed.