Version bump to v0.4.1

I’d consider this a patch release due to the fact that this should’ve
been done since the start, and I’m a bit surprised that no-one has filed
an issue about it. Suppose that’s because Kafka actually create the log
directories and then it’s not a big deal.

metadata.rb

@@ -6,7 +6,7 @@
 license          'Apache 2.0'
 description      'Installs and configures a Kafka broker'
 long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
-version          '0.4.0'
+version          '0.4.1'
 
 recipe 'kafka::source', 'Downloads, compiles and installs Kafka from source releases'
 recipe 'kafka::binary', 'Downloads, extracts and installs Kafka from binary releases'