Add Diablo name generator
[ping] New ping module to pull from a list of regexes and responses

The list can either be hardcoded into the module, or set in a text file.

Also took the bind() and sub() functions out of bot.bind_commands() so
that we can access sub() from the module. It's also a little easier to
read this way.
Merge branch 'name' into arati
Merge branch 'ping' into arati