[adminchannel] Commands now work via PM and comments are a bit more explicative.

Rewrite of Adminchannel to combine similar code-sets:
  - (de)op/(de)voice
  - (un)ban/(un)quiet

Made all functions available via PM
Revamped comments to be more explicative
Most commands are more flexable as to nick/channel argument order

Signed-off-by: Eldon McGuinness <eldon.mcguinness@gmail.com>