Added Stamen Maps License attribution
Added Stamen Maps License attribution

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