Cleanup pkg_web#move_files

[alexeagle]

This helper function tries to be callable from either an action or an aspect, by following the Law of Demeter and not asking for the whole ctx object as a parameter.
However it feels like overkill and causes a bunch of extra documentation in that rule. We don't even mean for it to be public I imagine. We should track down usages, make it private (underscore prefix) and just read things we need from ctx

[alexeagle]

fixed in 815a3ca