Handle multiple embedded assemblies with the same name.

[holly-hacker]

The sample from #14 has multiple LibTongue.resources.dll files, for different cultures. Right now, only the very last one gets written to disk, which is not the behavior I want.

Possible ways of handling this are:

• Only writing the DLL with a matching culture, falling back to neutral if needed.
• Writing all DLLs, but suffixing non-neutral assemblies with their shortened culture name (eg. en-US).