0.3.0 ready for testing!

Thanks to the hard work of @costasovo in his attempt to support rewriting the full dependency tree in #10, I have been able to tackle this issue now finally. This release contains:

• Full dependency tree support. All dependencies (and their dependencies and so on...) are now automatically processed by Mozart. You only need to define the dependencies of your own project that you want to rewrite and the full dependency tree of those packages will be processed.
• Smarter logic when copying classmap autoloaders. Sometimes there was weird behaviour noticeable when a package contained both classmap autoloaders and namespace autoloaders, resulting in files not being copied or ending up in the wrong directories. This release fixes that.