[plt-scheme] language levels in planet

Dave Herman wrote:

> What would it take to be able to implement language levels in planet 
> and have them get added to the "Choose Language..." dialog box?

The major change to PLaneT  between 209 and 299 that allowed PLaneT 
package documentation to automatically show up in Help Desk should in 
principle also allow PLaneT packages to install new language levels. 
Looking through the Help Desk it appears there's a tiny snag, though: 
DrScheme expects you to name the module implementing your language using 
a (require (lib ...)) statement, which can't be done for PLaneT 
packages. That's all I know right now; I expect to have more to tell you 
about this in the future.

-jacob