Change the reserve words dira, outa, ina

Capt. Quirk

Since the P1-64 i/o never materialized, eliminate the "a" to create a better memonic for new spin programmers ( dir, out, in ) in the next release of the Prop tool.

Phil Pilgrim (PhiPi)

That would never fly. Existing programs that use dira, etc., would not compile; and there are already many objects with method names like in and out. I'm afraid we're stuck with the current mnemonics.

-Phil