Image32 ver 4.6

This release contains many bug fixes (see issues #10..#101).
Andreas Hausladen has also made multiple contributions to the library that that have very significantly improved its performance.

Image32 ver 4.3

This is a minor update with numerous bugfixes (mostly to the optional package installers).

Image32 ver 4.2

Version 4.2

Updated Clipper library (polygon clipping)
Img32.Extra: replaced SmoothToBezier function with new SmoothToCubicBezier function
Numerous other minor bug fixes and improvements