This is a command line interface to the Games::Dice library. It takes
die rolling specifications in the form of adb[+-*/b]c.
(This specification may change a bit over time, but not radically.)
The optional end modifies the sum of the rolls. b means take the
best c rolls and sum them. Also / truncates the result to
an integer after division.
a is optional and defaults to 1; this is number of dice to roll.
b is the number of sides on each die. % is shorthand for 100.
Dice specifications can be piped in, given on STDIN or as positional
parameters from the command line.
If a positional parameter matches a file name, it will be opened and
each line of the file evaluated.