message: Changed Hackflight instructions
diff: @@ -56,11 +56,12 @@ to generate a .sln file from a .uproject file, inability to compile source code,
  You should first clone the MulticopterSim repository into your <b>Documents/Unreal Projects</b> folder, creating
  that folder if it doesn't already exist.
  -In addition to cloning MulticopterSim, you will need the [Hackflight](https://github.com/simondlevy/Hackflight)
  -repository. Although Hackflight is hardware-independent, it is set up as an
  -Arduino library, to support its primary intended use. So the most sensible way
  -to install it is to clone it into your <b>Documents/Arduino/libraries</b> folder,
  -creating that folder if it doesn't exist.
  +Although MulticopterSim is designed to work with any flight-control software
  +you like, it is set up to work with the
  +[Hackflight](https://github.com/simondlevy/Hackflight) software by default.
  +Since Hackflight is it is set up as an Arduino library, the most sensible way
  +to install it is to clone it into your <b>Documents/Arduino/libraries</b>
  +folder, creating that folder if it doesn't exist.
  Now double-click on <b>MulticopterSim.uproject</b> to launch UnrealEditor; then click the Compile icon at the top.
  You can then use your favorite code editor (ours is
  