REPL CLI

Reworked the awkward CLI into a PowerArgs based one. Going to see about providing the memory as a LINQ query source in a minor update.

After that will be hosting IronPython (IPY) and possibly C# (CSI/Script#) Interactive and also Cling (native C REPL), maybe all of the above, since it'd be sort of nice to have a Swiss forensics memory army knife. I'll have it finished right after the 25 hour day!