rpn 3.4.1
rpn 3.4.2
rpn 3.4.3
rpn 3.4.4
rpn 3.4.5
rpn 3.4.6
rpn 3.4.7
rpn 3.5.0
rpn 3.5.1
rpn 3.6.0
rpn 3.6.1
rpn 3.6.2
rpn 3.7.0
rpn 3.8.0
rpn 4.0.0.alpha2

I forgot to save off a copy of alpha1.

rpn 4 added support for lists in arguments.
rpn 4.0.0
rpn 4.0.1
rpn 4.0.2
rpn 4.1.0
rpn 4.2.0