Make it possible to display multiple alternative mimetypes
Make it possible to display multiple alternative mimetypes

ChinaQuants/IRkernel,elaOnMars/IRkernel,ibm-et/IRkernel,mikecroucher/IRkernel,ibm-et/IRkernel,rgbkrk/IRkernel,JanSchulz/IRkernel,chendaniely/IRkernel,Phobia0ptik/IRkernel,gdtm86/IRkernel