Support for unsupported options

Now you can pass any argument to the retroarch program directly. This is useful for those options not supported in enjoy yet. In the commandline everything that comes after the first -- will be just passed over.

• added new option -- to bypass arguments directly to retroarch
• new logo design

For normal usage, download the "enjoy_0.2.0.tar.gz" archive.
The other one "enjoyd.gz" is just for debugging.