Fix formatting of common arguments
Allow panda_dispatch_args be used multiple times

Ugh, GNU libc's optind has extra weird state making it delightfully
non-standard.
Provide extra information about unparsed arguments
Spell suppress correctly.
Add a parser for diff arguments
Add a program to compare differening conditions
Remove -j from all examples
Add a man page for pandaseq-diff
Fix mistakes in Vala binding
Rebased regression-testing framework on new code