Switch from Alternative to MonadPlus :-(
Switch from Alternative to MonadPlus :-(

Also add a bunch of new instances

SeanRBurton/aeson,roelvandijk/aeson,beni55/aeson,bwo/aeson,neobrain/aeson,timmytofu/aeson,JPMoresmau/aeson,sol/aeson,23Skidoo/aeson,sol/aeson,jkarni/aeson,sol/aeson,abbradar/aeson,lykahb/aeson,dmjio/aeson,neobrain/aeson,aelve/json-x,nurpax/aeson,roelvandijk/aeson,plaprade/aeson