implement --version
fix undef in argument list of one-command applications
changelog for [undef] in args
make "version" the canonical name of --version
make it easier to tweak version display
credit for --version command
drive-by typo fix
v0.321

          avoiding getting [undef] in argument list in Simple apps

          add --version support via version command (thanks, Jakob Voss!)
require a newer Getopt::Long

in 2.38 and maybe some earlier versions, --version is handled
by Getopt::Long even when it should not be as part of its weird
magic attached to ->VERSION
v0.322

          require a newer Getopt::Long to avoid --version conflicts
typo fix
typo fixes
Merge remote-tracking branch 'rjbs/master'
shortcircuit options as commands