Adding layers with different CRS #942
Description
Hi, i've read issue #693 regarding support for adding layers with different CRS. Although it might not be a common use case, it does have it's uses. Mashups is one example, where users "shop" base layers from a host of different sources which might not all support a common CRS. Rescue services often depend on a host of different map sources (ranging from GIS-specialist data to public available services), which are combined (mashup) to give a better overview of the situation (my use case). Other frameworks does support this, but lack the excellent support for mobile devices and the lightweight characteristics of Leaflet. I do understand that this present some problems, but since project and reproject is supported, I believe it should be possible to move from single CRS to multiple CRS definitions.
I've cloned Leaflet and will look into this my self. If I succeed, I'll send a pull request for my solution.