message: install inno setup in appveyor
diff: @@ -21,6 +21,10 @@ install:
  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
  - rustc -vV
  - cargo -vV
  + # Install InnoSetup
  + - appveyor-retry appveyor DownloadFile https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2017-08-22-is.exe
  + - 2017-08-22-is.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-
  + - set PATH="C:\Program Files (x86)\Inno Setup 5";%PATH%
  build_script:
  - cargo build --verbose
  