Need a RubyCocoa compatible layer

[lsansonetti@…]

To preserve backwards compatibility, but also to help developers to migrate their code from RubyCocoa to MacRuby, we need a small layer on top of MacRuby that emulates the RubyCocoa syntax and semantics.

The layer would ship with MacRuby, and would emit warnings on every RubyCocoa-specific expression, to explain the developer how to rewrite it for MacRuby and get rid of the warning.

The warnings would be emitted by default, but we also need a way to disable them (even if -w is passed to the interpreter). Some developers might want to use the layer as is and not port their code immediately.

[lsansonetti@…]

One thing to add also is the syntax-sugar layer that was written on top of the Cocoa structures (the oc_types.rb file).