Update README.rst

Test

README.rst

@@ -7,6 +7,7 @@ Pytubes is a library that optimizes loading datasets into memory.
 
 At it’s core is a set of specialized C++ classes that can be chained together to load and manipulate data using a standard iterator pattern. Around this there is a cython extension module that makes defining and configuring a tube simple and straight-forward.
 
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 Simple Example