Added ability to execute native powershell scripts
Added ability to execute native powershell scripts

by specifying "#ps1_native", powershell will be launched from the
sysnative file system redirected folder. useful when trying to import
modules that only reside in 64bit powershell (ServerManager for example)

alexpilotti/cloudbase-init,telerik/cloudbase-init,CropCircleSys/bsd-cloudinit,pellaeon/bsd-cloudinit,stefan-caraiman/cloudbase-init,chialiang-8/cloudbase-init,stackforge/cloudbase-init,pellaeon/bsd-cloudinit,bincentvaret/bsd-cloudinit,ader1990/cloudbase-init,openstack/cloudbase-init,whiteear/cloudbase-init,cmin764/cloudbase-init