Source code on SVN repository

I'm proud to announce the availability of O2 Project source code on SF.net SVN repository: https://sourceforge.net/p/o2project/code/

I also took the opportunity to change the directory layout of the source code to be more rational, you can refer to Source.txt for instructions on how to compile the source code.

Henceforth the SVN repository will be the unique way to get O2 source code (no more .zip source code releases).