Feature request: relative path for code output

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Go to Window / Preferences / Protocol Buffer / Compiler / Options
2. Choose "Generate Java"
3. Enter "." as Java Output Directory

What is the expected output? 

Expected:

The code should be generated from the folder containing the proto file, e.g. if 
I save /home/user/workspace/src/.../sub_folder/foo.proto, the output code 
should be stored in /home/user/workspace/src/.../sub_folder/com/acme/Foo.java.

What do you see instead?

protoc does not launch (nothing in console) when we enter such a path.

What version of the product are you using? On what operating system?

1.3.3.201210291557  Linux 64bit

Original issue reported on code.google.com by [email protected] on 11 Jan 2013 at 2:35