Update dependencies and remove uniform updateAfterBind bit

Account for alpha in error metric

Add HDR support

- HDR images may be loaded as EXR images
- When HDR images are analyzed, an exposure and tonemapping operator is
  needed to convert to LDR ranges
- Added support for ACES, Reinhard, and Hable tonemapping operators
- Added exposure slider control (specified in log2 stops)

Fix viewport resize