Make `rpn.py` execute the command line args if they are not all existing files (or '-' to indicate stdin). Added `--stdin` option to go with this so that `stdin` is read after the command line is executed.
1.0.17
Improved error output. Updated README with function examples.
1.0.16
Added `count` processing to `dup`. Made debugging output more useful when (perhaps) whitespace is in a command and line splitting is on. Stop executing commands on a line if an error is encountered.
1.0.15
Added toggling of debug.
1.0.14
Updated README examples, added more debug printing.
1.0.13
Make `apply` examine the function it is about to run for its number of arguments.