New version 10.6.4
https://github.com/bgrabitmap/bgrabitmap/releasesImage formats: optimize reading common tiff formats
basic support for portable any map (PBM, PGM, PPM)
skip non-essential corrupted chunks in PNG
fix GIF reader/writer for low bit depth (when color count <= 2)
fix SVG functions returning size in pixels
Miscellaneous: fix right click in original event
fix compilation for fpGUI
fix runtime error in blur
fix sign issue in Emboss filter
added array of string constants for special key enum