Fixed 'DataOnly' header issue

This has been fixed: Looks like it adds the "headers" in the sheet to
the data when you specify -DataOnly

ImportExcel.psm1

@@ -128,7 +128,8 @@ function Import-Excel {
                     [PSCustomObject]$newRow
                 }
             }
-        } else {
+        } 
+        else {
             if (!$Header) {
                 $Header = foreach ($Column in 1..$Columns) {
                     $worksheet.Cells[$HeaderRow,$Column].Value
@@ -140,7 +141,7 @@ function Import-Excel {
             } 
             else {
                 if ($DataOnly) {
-                    $CellsWithValues = $worksheet.Cells | where Value
+                    $CellsWithValues = $worksheet.Cells | where {$_.Value -and ($_.End.Row -ne 1)}
 
                     $Script:i = -1
                     $ColumnReference = $CellsWithValues | Select-Object -ExpandProperty End | Group-Object Column |