Update README.md

Author: csabahruska

README.md

@@ -13,7 +13,7 @@ Read more.
 Transformation | Schema
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 <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=113">vectorisation</a> | <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=113"><img src="https://raw.githubusercontent.com/andorp/grin/master/images/vectorisation.png" width="500" ></a>
-<a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=116">case simplification</a> | <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=116">case simplification</a><img src="https://raw.githubusercontent.com/andorp/grin/master/images/case-simplification.png" width="500" ></a>
+<a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=116">case simplification</a> | <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=116"><img src="https://raw.githubusercontent.com/andorp/grin/master/images/case-simplification.png" width="500" ></a>
 <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=118">split fetch operation</a> | <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=118"><img src="https://raw.githubusercontent.com/andorp/grin/master/images/split-fetch-operation.png" width="500" ></a>
 <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=123">right hoist fetch operation</a> | <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=123"><img src="https://raw.githubusercontent.com/andorp/grin/master/images/right-hoist-fetch.png" width="500" ></a>
 <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=126">register introduction</a> | <a href="http://nbviewer.jupyter.org/github/andorp/grin/blob/master/papers/boquist.pdf#page=126"><img src="https://raw.githubusercontent.com/andorp/grin/master/images/register-introduction.png" width="500" ></a>