Mod Audi RS7/A7 [Fix version] 3.2 for BeamNG.drive

[Adding in this update]
1:fixed Driving Safety System;
(If it doesn't work,pls clear cache and check if you have both new and old version)
2:fixing 2.8 i6 engine and 3.0 i6 engine which broken in 0.26.1;
3:sound update;(no more SBR's sound in-game,now the i6 and V8 sound are using,
may have some bugs or errors,need to change in next update.)
4:modify .jbeam and .pc file to change the Wagon body both at body style and information
5:delete some parts which don't have 3D models,decrease the file size;
6:modify most of part's value to make it more sense;
7:misc added:the Navigation Unit and the tow hitch are available.
suggestion are welcome!