added Get-History proxy cmdlet to improve performance; fixed bug when extended history would not clear 100% when HistoryPx is removed using Remove-Module
update RunspaceInternals.cs before name change
moved reverse engineered code into extension methods
updated error message so that it works for any module
removed commented out code that has been superceded by an extension method
cleanup of some commented out code that is no longer necessary
refactored Out-Default as a proxy cmdlet that is compatible with other Out-Default proxy cmdlets; added help URIs where they were missing; added help documentation for Clear-History, Get-History and Out-Default cmdlets