Tools to read and write animated gif files

Functions to read and write animated gifs to and from 4-D RGB image arrays

These functions can be used to read and write animated gifs. They are intended for use with 4-D image arrays of various type. Supported types include RGB/RGBA arrays, as well as indexed images. Indexed mages with transparent content can be specified by a corresponding vector of indices, or by simply appending an alpha channel to the image array itself. When writing, colormaps, transparency, and disposal method can be specified per-frame or globally.
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Optional functionality requires the use of imagemagick and is exclusively intended to work in a *nix environment, but default settings should work on other systems. I have no intention of modifying this to be more robust in that aspect.
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GIFREAD(FILEPATH, {KEYWORDS})
reads all frames of an animated gif into a 4-D image array
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GIFWRITE(INARRAY, {DISPOSALMETHOD}, FILEPATH, {DELAY}, {WRITEMETHOD})
GIFWRITE(INARRAY, MAP, {TRANSPARENTIDX}, {DISPOSALMETHOD}, FILEPATH, {DELAY}, {WRITEMETHOD})
Write image stack to an animated gif