Added __repr__ for Nick class. Resolves #413 somewhat.
[various modules] Utilize Trigger.is_privmsg

Replace trigger.sender.startswith('#') checks with trigger.is_privmsg
in the following modules: admin, find, meetbot, reload, seen.
Merge pull request #417 from flyte/hotfix/nick-repr

Added __repr__ for Nick class. Resolves #413 somewhat.
Merge pull request #425 from Ohcanep/feature/is_privmsg

[various modules] Utilize Trigger.is_privmsg
Merge remote-tracking branch 'upstream/master'