Using 2 proto files with same name for messages.

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What steps will reproduce the problem?
1. Create 2 proto files with same message name, say "Person"
2. Init both by using parsefile
3. Use Person->encode .. It uses last one "Person" class, first one is 
overridden. 

What is the expected output? What do you see instead?
I expect to use different namespaces for each proto.

What version of the product are you using? On what operating system?
Package: libgoogle-protocolbuffers-perl  
Version: 0.08-2

OS: Ubuntu 13.04

Original issue reported on code.google.com by taipovm on 27 Sep 2013 at 10:42