[Feature Request] Place RAW in a specific Timeline

[ereynier]

I think it could be great if the RAWs were in there own timeline (like videos but with the possibility to not index them in main timeline) because it can make duplicate in series of photos and use .nomedia file just unindex all the raws.

[pulsejet]

As mentioned in #152, they need to be in a separate folder outside the timeline path. The issue is that to build the timeline memories needs to counting in the filecache table fast (very fast). Excluding one type of files isn't going to be right for performance.