Added support for UE version in build pipeline

fix remaining issues for packaging

Fix tires comming off, microsoft#940

fixed car controls in log: microsoft#869

Release 1.1.8

Support for Logitech G920 whel, physics tuning for car, reset stress …

…test fix, new API

osx build, segmentation, CV mode enhancements

Car model release

Merge branch 'master' of https://github.com/Microsoft/AirSim

segmentation APIs, car mesh