Use .forEach instead of loop for loading plugins
Make it more clear that config.command is 1 char

There's an assumption some places in the code that config.command is 1
char long while other places don't assume so.
Fixup bot.js to match new config structure

The plugins possibly still need updating
Fix debugging in modubot/plugin.js
Add .seen <nick> plugin
Merge pull request #15 from reynir/seen

Fixup and seen plugin