fix for #512 & #525

There is an issue with the ConvertFromExcelToSQLInsert where a quote in the text will not be converted properly and will cause invalid insert statements to be created, this commit makes the correction to handle the scenario.

ConvertFromExcelToSQLInsert.ps1

@@ -108,7 +108,7 @@ function ConvertFrom-ExcelToSQLInsert {
                 'NULL'
             }
             else {
-                "'" + $record.$propertyName + "'"
+                 "'" + (($record.$propertyName.ToString()) -replace "'","''") + "'"
             }
         }
         $targetValues = ($values -join ", ")