Fix brew bottle versioning.

Library/Homebrew/extend/pathname.rb

@@ -164,6 +164,10 @@ class Pathname
     /_((\d+\.)+\d+[abc]?)[.]orig$/.match stem
     return $1 if $1
 
+	# brew bottle style e.g. qt-4.7.3-bottle.tar.gz
+    /-((\d+\.)*\d+)-bottle$/.match stem
+	return $1 if $1
+
     # eg. otp_src_R13B (this is erlang's style)
     # eg. astyle_1.23_macosx.tar.gz
     stem.scan(/_([^_]+)/) do |match|

Library/Homebrew/test/test_versions.rb

@@ -159,4 +159,9 @@ class VersionTests < Test::Unit::TestCase
     check 'http://ftp.de.debian.org/debian/pool/main/m/mmv/mmv_1.01b.orig.tar.gz',
       '1.01b'
   end
+
+  def test_bottle_style
+    check 'https://downloads.sourceforge.net/project/machomebrew/Bottles/qt-4.7.3-bottle.tar.gz',
+      '4.7.3'
+  end
 end