add .gitignore
add .gitignore

llimllib/limbo,TetraEtc/limbo,llimllib/limbo,wmv/slackbot-python,dorian1453/limbo,serverdensity/sdbot,ruhee/limbo,rizaon/limbo,palachu/sdbot,kylemsguy/limbo,TetraEtc/limbo,NUKnightLab/slask,Marclass/limbo,shawnsi/limbo,uilab-github/slask,freshbooks/limbo,sentinelleader/limbo,UnILabKAIST/slask,uilab-github/slask,signalnine/alanabot,michaelMinar/limbo,mmisiewicz/slask