skal authored Sep 07, 2016 and Michael Natterer committed Sep 11, 2016

WebP saving: various improvements in file-webp-save.c

- reorganizes the main loop
- fixes (temporarily) the bad timestamp by using fixed 100ms delay between frames
- fixes the progress bar
- takes care of resource clean-up for some previously unchecked error paths
- uses 'minimize_size' and 'allow_mixed' options more appropriately
- only remuxes the final bytestream when ICC profile is present. For
  most common case, we insert the loop-count information during muxer
  creation instead of by remuxing at the end.