Relocate files (hopefully final!)

InstallModule.ps1

@@ -0,0 +1,11 @@
+param ($fullPath)
+#$fullPath = 'C:\Program Files\WindowsPowerShell\Modules\ImportExcel'
+if (-not $fullPath) {
+    $fullpath = $env:PSModulePath -split ":(?!\\)|;|," |
+        Where-Object {$_ -notlike ([System.Environment]::GetFolderPath("UserProfile")+"*") -and $_ -notlike "$pshome*"} |
+            Select-Object -First 1
+            $fullPath = Join-Path $fullPath -ChildPath "ImportExcel"
+}
+Push-location $PSScriptRoot
+Robocopy . $fullPath /mir /XD .vscode .git CI __tests__ data mdHelp /XF appveyor.yml azure-pipelines.yml .gitattributes .gitignore filelist.txt install.ps1 InstallModule.ps1
+Pop-Location