RawGL version 1.5.2f windows binaries

• removed VCPKG integration
• OpenImageIO updated to the latest codebase (libraw, libjxl, heif, etc.)

RawGL version 1.5.2

RawGL version 1.5.2

RawGL version 1.6.1 (alpha)

RawGL version 1.6.1 (alpha)

• fast PLY parser for initial 3D mesh support
• bg color (GL clear color) settings

This is an alpha version, that can be used in production but with care.