Update docs (#200)

This is a documentation-only update so automerging.  Please review the commit if there are any follow-ups requested.

* Update .gitignore for docfx genertated files

* Update documenation (part 1)

* Update docs and add some samples

* More doc updates

docs/samples/smo/PowerShellScript/dbiteration.ps1

@@ -0,0 +1,27 @@
+<#
+This script demonstrates iterations through the rows and display collation details for a remote or local instance of SQL Server.
+#>
+
+#DLL location needs to be specified
+$pathtodll = "" 
+
+Add-Type -Path "$pathtodll\Microsoft.SqlServer.Smo.dll"
+Add-Type -Path "$pathtodll\Microsoft.SqlServer.ConnectionInfo.dll"
+
+#Connection context need to be specified
+$srv = New-Object Microsoft.SqlServer.Management.Smo.Server()
+$srv.ConnectionContext.LoginSecure = $false
+$srv.ConnectionContext.ServerInstance = "instance_name"
+$srv.ConnectionContext.Login = "user_id"
+$srv.ConnectionContext.Password = "pwd"
+
+$datatable = $srv.EnumCollations()
+
+Foreach ($row in $datatable.Rows)
+{
+   Write-Host "============================================"
+   Foreach ($column in $row.Table.Columns)
+   {
+      Write-Host $column.ColumnName "=" $row[$column].ToString()
+   }
+}