client/sniffer.lua:
- Changed for loop's syntax to be proper format.
- Added plugin enable after load.

sniffer/sniffer.lua:
- Moved SnifferPluginEnable and SnifferPluginDisable hooks into plugin
object so it checks the hooks when other sources enable/disable.
- Changed color formatting in plugin object's Enable and Disable
functions from original \color format to %color% format.