Update MacOS Homebrew install details

Credit to Adam Jensen for contributing the Homebrew formula

See #215

Author: chrisn

README.md

@@ -77,9 +77,8 @@ There is an [`audiowaveform`](https://aur.archlinux.org/packages/audiowaveform)
 
 ### Mac OSX
 
-You can install `audiowaveform` using Homebrew:
+You can install `audiowaveform` using Homebrew, thanks to [Adam Jensen](https://github.com/acj):
 
-    brew tap bbc/audiowaveform
     brew install audiowaveform
 
 ### Windows