Updated the Corona renderer to version 1.7.2.

Updated the Corona renderer to version 1.7.2.

Updated the Corona renderer to version 1.7.2.  in our megaservice online.megarender.com

Below is the list of changes in this release:

- Fixed black dots and black VFB screen in some cases when using the new experimental light solver


- Fixed a crash when changing a tonemapping parameter of a CoronaCamera that is referenced from another object (for example, ForestPack)
- Fixed camera target moving when changing the shift parameters
- Fixed occasional crashes when using textured lens distortion


- Fixed DR master not accumulating results from slave when one of them supports F16C instruction set and the other does not
- Fixed Hair & Fur simulation .stat file not being loaded correctly on DR slave
- Fixed occasional crashes of slave 3ds Max when DR starts
- Fixed DR issues when using older CPUs


- Fixed Vizpark plugins not being listed as compatible (they were compatible, but were not listed as compatible)
- Updated Corona Converter script to v1.39 (added VRayHairMtl conversion)