s/use base/use parent/; some other minor cleanups

	modified:   Build.PL
	modified:   lib/Bot/Cobalt.pm
	modified:   lib/Bot/Cobalt/Common.pm
	modified:   lib/Bot/Cobalt/Core.pm
	modified:   lib/Bot/Cobalt/Core/Sugar.pm
	modified:   lib/Bot/Cobalt/DB.pm
	modified:   lib/Bot/Cobalt/Frontend/RC.pm
	modified:   lib/Bot/Cobalt/Frontend/Utils.pm
	modified:   lib/Bot/Cobalt/IRC.pm
	modified:   lib/Bot/Cobalt/Utils.pm