Fixed offset bug. I was zeroing the pixels too early. Now the offset may be a little big

A little linting on lithophane.py

Fixing code

Merge branch 'master' of https://github.com/colbrydi/Lithophane

Moving fliprl to grayscale image

Type should be fliplr

Trying FlipRL

Update lithophane.py

Update lithophane.py

Update lithophane.py

Fixed variable naming to match text

Fixed offset and flipped x matrix

Update lithophane.py

Added some additional Descriptions in the tutorial

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