Remove show and update readme

Author: AlexaDeWit

README.md

@@ -12,8 +12,3 @@ ArrayBuffer bindings for PureScript.
 ## Documentation
 
 Module documentation is [published on Pursuit](http://pursuit.purescript.org/packages/purescript-arraybuffer).
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-## Important Usage Notes
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-- Usage of the ArrayBuffer<->String conversion functions requires the import of the NPM package 'text-encoding'.