add python-magic for S3
add python-magic for S3

stea4lth/TimelineJS,noikiy/TimelineJS,cweems/api-timeline-js,NUKnightLab/TimelineJS,deenjohn/TimelineJS,djaney/TimelineJS,stea4lth/TimelineJS,landsurveyorsunited/TimelineJS,azeemmufti/TimelineJS,angeliaz/TimelineJS,anxintiancai/TimelineJS,NUKnightLab/TimelineJS,zstao/TimelineJS,matt-edgedesign/Timelinejs,pom95/timeline,JoaquinSiabra/TimelineJS,landsurveyorsunited/TimelineJS,djaney/TimelineJS,JoaquinSiabra/TimelineJS,1modm/TimelineJS,wangjun/TimelineJS,james-logan/TimelineJS,wangjun/TimelineJS,JoaquinSiabra/TimelineJS,noikiy/TimelineJS,pom95/timeline,CrossLead/TimelineJS,ryekee/TimelineJS,eldabbagh/TimelineJS,wangjun/TimelineJS,1modm/TimelineJS,LauraHilliger/TimelineJS,anxintiancai/TimelineJS,ryekee/TimelineJS,LauraHilliger/TimelineJS,LauraHilliger/TimelineJS,anxintiancai/TimelineJS,ycaihua/TimelineJS,deenjohn/TimelineJS,cweems/api-timeline-js,djaney/TimelineJS,matt-edgedesign/Timelinejs,deenjohn/TimelineJS,zstao/TimelineJS,zstao/TimelineJS,stea4lth/TimelineJS,noikiy/TimelineJS,CrossLead/TimelineJS,cweems/tc_timeline,james-logan/TimelineJS,eldabbagh/TimelineJS,1modm/TimelineJS,ryekee/TimelineJS,landsurveyorsunited/TimelineJS,pom95/timeline,NUKnightLab/TimelineJS,ycaihua/TimelineJS,matt-edgedesign/Timelinejs,angeliaz/TimelineJS,james-logan/TimelineJS,azeemmufti/TimelineJS,ycaihua/TimelineJS,cweems/tc_timeline