make iframe media type parser accept double or single quotes
make iframe media type parser accept double or single quotes

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