fix: use Remove-Item in alias removal to support Powershell < 6

Signed-off-by: Chapman Pendery <cpendery@vt.edu>

fix: powershell kaldo aliases should override default ones

Signed-off-by: Chapman Pendery <cpendery@vt.edu>

fix: expose version

Signed-off-by: cpendery <cpendery@vt.edu>