GTK Pattern Creation Lab -- Summary of changes
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changes from 0.0.7 to 0.0.8
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General
* Fix: Color mix function cmix was not mixing colors correctly.
* Fix: Two bugs in the image generation function which skewed
       the resulting image.
* Added idle process to handle image generation.
* Implemented interrupt button.
* Image generation progress bar.
* Spinner accuracy which is used in rmansl

rmansl pattern
* Fix: A minor memory problem occurring when the rmansl pattern
       attempted to load an improper shader after it had a legal
       shader in memory.
* Created an Options Window
* Options: change start color (Cs)
* Options: change light color (Cl)
* Options: Model Sphere -- this will change the surface normals (N, Ng),
       view vectors (I), and intersection points (P), to simulate 
       a spherical object.
* Options: Moved the restrict spinners option into this window.
* Added shader compiler information to main window (new with BMRT 2.4)