fixed mesh normals

fixed surface normals

updated ns

fixed surface normals

mesh centering

added median filter
adjusted size of output

fixed nasa example

added lena example stl
fixed rotation issue

fixed NASA example

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added lena image

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added cover photo
added small example code
added small example code

removed top code example

added some example screenshots
updated examples

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fixed example text

edited README
updated NASA example
added command line image2stl script

added docstring

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added su2 stl

removed su2 example

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added check for PIL

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some PEP8 formatting
unittests added
fixed unittest for text output

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fixed bug in unittest for text output

Update LICENSE.txt
regenerated test data