Change line endings; improve package generation

CreateFromDirectory fails if there is already a zip file, so we
remove it before hand. We generate the archive with the
`inform-*.*.*` root directory (before only its contents were
included), and we make sure to copy the LICENSE and README.md
files into the directory before zipping.

dist/package.ps1

@@ -1,18 +1,20 @@
-$version = (cmake . -Bbuild/production -DCMAKE_BUILD_TYPE=Release -G "NMake Makefiles" | Select-String '-- inform version: ')
-$version = $version.ToString().Split(' ')[3]
-
-$prefix = "inform-$version"
-$target = "dist/$prefix"
-$archive = "$($target)_win-amd64.zip"
-
-cmake . -Bbuild/production -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="$target" | Out-Null
-cd build/production
-nmake
-test/inform_unittest.exe
-nmake install
-cd ../..
-
-
-Add-Type -Assembly System.IO.Compression.FileSystem
-$compressionLevel = [System.IO.Compression.CompressionLevel]::Optimal
-[System.IO.Compression.ZipFile]::CreateFromDirectory($target, $archive, $compressionLevel, $false)
+$version = (cmake . -Bbuild/production -DCMAKE_BUILD_TYPE=Release -G "NMake Makefiles" | Select-String '-- inform version: ')
+$version = $version.ToString().Split(' ')[3]
+
+$prefix = "inform-$version"
+$target = "dist/$prefix"
+$archive = "$($target)_win-amd64.zip"
+
+cmake . -Bbuild/production -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="$target" | Out-Null
+cd build/production
+nmake
+test/inform_unittest.exe
+nmake install
+cd ../..
+Copy-Item LICENSE $target
+Copy-Item README.md $target
+
+Remove-Item -force $archive
+Add-Type -Assembly System.IO.Compression.FileSystem
+$compressionLevel = [System.IO.Compression.CompressionLevel]::Optimal
+[System.IO.Compression.ZipFile]::CreateFromDirectory($target, $archive, $compressionLevel, $true)