Attempt setting package version with PowerShell, remove obsolete install script

appveyor.yml

@@ -72,9 +72,8 @@ build_script:
   # Collect binary, set package version and build chocolatey package
   - copy .\ffsend-%TARGET%-static.exe .\pkg\choco\ffsend\tools\ffsend.exe
   - cd .\pkg\choco\ffsend\
-  - sh: >-
-      echo $(echo $APPVEYOR_REPO_TAG_NAME | cut -c 2-)
-      sed "s/0\\.0\\.0/$(echo $APPVEYOR_REPO_TAG_NAME | cut -c 2-)/" -i ffsend.nuspec
+  - ps: echo $env:APPVEYOR_REPO_TAG_NAME
+  - ps: ((Get-Content -path .\ffsend.nuspec -Raw) -replace "0.0.0","$env:APPVEYOR_REPO_TAG_NAME.Substring(1)") | Set-Content -Path .\ffsend.nuspec
   - choco pack
   # - choco push --api-key %CHOCOLATEY_TOKEN%
   - dir

pkg/choco/ffsend/tools/chocolateyinstall.ps1

@@ -1,28 +0,0 @@
-# IMPORTANT: Before releasing this package, copy/paste the next 2 lines into PowerShell to remove all comments from this file:
-#   $f='c:\path\to\thisFile.ps1'
-#   gc $f | ? {$_ -notmatch "^\s*#"} | % {$_ -replace '(^.*?)\s*?[^``]#.*','$1'} | Out-File $f+".~" -en utf8; mv -fo $f+".~" $f
-
-$ErrorActionPreference = 'Stop';
-$toolsDir   = "$(Split-Path -parent $MyInvocation.MyCommand.Definition)"
-$fileLocation = Join-Path $toolsDir 'ffsend.exe'
-
-$packageArgs = @{
-  packageName   = $env:ChocolateyPackageName
-  unzipLocation = $toolsDir
-  fileType      = 'EXE'
-  file          = $fileLocation
-
-  softwareName  = 'ffsend'
-
-  # Checksums are now required as of 0.10.0.
-  # To determine checksums, you can get that from the original site if provided. 
-  # You can also use checksum.exe (choco install checksum) and use it 
-  # e.g. checksum -t sha256 -f path\to\file
-  # checksum      = ''
-  # checksumType  = 'sha256' #default is md5, can also be sha1, sha256 or sha512
-
-  # silentArgs    = ""
-  validExitCodes= @(0)
-}
-
-Install-ChocolateyPackage @packageArgs