Delete installed documentation after install

Documentation is all online nowadays, and is more current there.

Documentation often takes up more space than the rest of the package.

Package listings are now more relevent.

We'll make it optional as soon as one person complains.

Library/Homebrew/brew.h.rb

@@ -190,6 +190,10 @@ class Cleaner
   def initialize f
     @f=f
     [f.bin, f.lib].each {|d| clean_dir d}
+    
+    # you can read all of this shit online nowadays, save the space
+    (f.prefix+'share'+'doc').rmtree rescue nil
+    (f.prefix+'share'+'info').rmtree rescue nil
   end
 
 private