[$] Catching up with RawTherapee 5.x

Free-software raw photo editor RawTherapee released a major newrevision earlier this year, followed by a string of incrementalupdates. The 5.x series, released at a rapid pace, marks asignificant improvement in the RawTherapee's development tempo - theproject's preceding update had landed in 2014. Regardless of the speed ofthe releases themselves, however, the improved RawTherapee offers users alot of added functionality and may shake up the raw-photo-processingworkflow for many photographers.