[FEATURE REQUEST] Ability to read unfinished/corrupted EXRs

[AlexeySmolenchuk]

Is your feature request related to a problem? Please describe. It would be great to have the opportunity to load unfinished or corrupted EXR images as is. Currently, we can't load even valid scanlines from the unfinished files. Always getting "Some scanline chunks were missing or corrupted" error.

Describe the solution you'd like Natural solution I see is to extend the reader functions' signatures, or add a global statement which defines the level of tolerance for such cases, and optionally returns some stats for further update.