message: Added support for setting environment variables. Fixed
diff: [Setup]
  AppName=Wasmer
  -AppVersion=0.4.0
  +AppVersion=0.6.0
  DefaultDirName={pf}\Wasmer
  DefaultGroupName=Wasmer
  Compression=lzma2
  @@ -14,6 +14,12 @@ WizardSmallImageFile=..\..\media\wizard_logo_small.bmp
  SetupIconFile=..\..\media\wizard_logo.ico
  DisableWelcomePage=no
  +[Registry]
  +Root: HKCU; Subkey: "Environment"; ValueType:string; ValueName: "WASMER_DIR"; \
  + ValueData: "{%USERPROFILE}\.wasmer"; Flags: preservestringtype
  +Root: HKCU; Subkey: "Environment"; ValueType:string; ValueName: "WASMER_CACHE_DIR"; \
  + ValueData: "{%USERPROFILE}\.wasmer\cache"; Flags: preservestringtype
  +
  [Files]
  Source: "..\..\target\release\wasmer.exe"; DestDir: "{app}\bin"
  Source: "..\..\wapm-cli\target\release\wapm.exe"; DestDir: "{app}\bin"
  