improve quote db schema, add channel random quotes
improve quote db schema, add channel random quotes

jmgao/skybot,craisins/wh2kbot,SophosBlitz/glacon,df-5/skybot,Teino1978-Corp/Teino1978-Corp-skybot,olslash/skybot,Jeebeevee/DouweBot,parkrrr/skybot,andyeff/skybot,cmarguel/skybot,ddwo/nhl-bot,isislab/botbot,rmmh/skybot,elitan/mybot,TeamPeggle/ppp-helpdesk,craisins/nascarbot,callumhogsden/ausbot,Jeebeevee/DouweBot_JJ15,crisisking/skybot