Add Leaflet.Indoor to plugins.md
Add Leaflet.Indoor to plugins.md

davojta/Leaflet,Ubisense/Leaflet,davojta/Leaflet,brah/Leaflet,tsantacruz/RotationalMarker,jasonoverland/Leaflet,tsantacruz/RotationalMarker,CapeSepias/Leaflet,jasonoverland/Leaflet,iZucken/Leaflet,geoloep/Leaflet,AP-whitehat/Leaflet,davojta/Leaflet,jasonoverland/Leaflet,Trufi/Leaflet,codeator/Leaflet,geoloep/Leaflet,CapeSepias/Leaflet,Ubisense/Leaflet,CapeSepias/Leaflet,rlugojr/Leaflet,brah/Leaflet,frogcat/Leaflet,Leaflet/Leaflet,Ubisense/Leaflet,Leaflet/Leaflet,Leaflet/Leaflet,rlugojr/Leaflet,msiadak/Leaflet,iZucken/Leaflet,sisou/Leaflet,frogcat/Leaflet,scaddenp/Leaflet,iOffice/Leaflet,Neorth/Leaflet,AP-whitehat/Leaflet,sisou/Leaflet,stefanocudini/Leaflet,brah/Leaflet,Neorth/Leaflet,Trufi/Leaflet,iOffice/Leaflet,sisou/Leaflet,akrzyzanowskino/TeamSE,akrzyzanowskino/TeamSE,iZucken/Leaflet,msiadak/Leaflet,Trufi/Leaflet,scaddenp/Leaflet,codeator/Leaflet,AP-whitehat/Leaflet,frogcat/Leaflet,codeator/Leaflet,rlugojr/Leaflet,stefanocudini/Leaflet,geoloep/Leaflet,iOffice/Leaflet,Neorth/Leaflet,msiadak/Leaflet,tsantacruz/RotationalMarker,akrzyzanowskino/TeamSE,stefanocudini/Leaflet,scaddenp/Leaflet