newRPL: Making RPL more readable

[Han]

If we can use \ for escape characters, perhaps newRPL can use a special escape sequence as an alias for << (the actual character, not my poor representation using two "less than" symbols). Similarly for >>. And \BS for the actual backslash character (or whatever the standard escape sequence is for this character). Maybe \LP and \RP for "left program" and "right program" symbols? This makes it easier to program on a PC without needing character translation.

(Basically, bypassing any translation that would normally occur during file transfers like back in the HP48 days would be good since most people are going to get more speed from their SD card.)