We need a new operator '..' to access to members of childitems of a collection

```PowerShell
#example 1
$files = Get-ChildItem -File
#Let's get the length of every file.
$files..Length
```

```PowerShell
#example 2
$hash = @{
    first = @{
        name = 'one'
        value = 1
    }
    second = 'two'
    'first name' = 'Jobs'
}
#The member intellisense would be clearer in PowerShell_ISE editor and the TAB completion.
$hash..first
```