Fix #1367913 [Calibre doesn't start with last source - It keeps running in background](https://bugs.launchpad.net/calibre/+bug/1367913)
Code to auto-generate textures with random noise blurred by a gaussian convolution
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Edit metadata dialog: Fix the author sort field not being marked red initially when the author sort does not match the author due to a Qt 5 behavior change. Fixes #1367943 [Author sort fails sometimes in tag browser](https://bugs.launchpad.net/calibre/+bug/1367943)
Fix compilation of texture generation code on OS X and windows
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