[Grace-core] Language Cleanup

[James Noble]

Hi all

To start the new year, Andrew proposed a few ideas for cleanup in the langauge

https://projects.cecs.pdx.edu:8443/~black/NewOOL/index.cgi/wiki/InheritanceSimplified
https://projects.cecs.pdx.edu:8443/~black/NewOOL/index.cgi/wiki/LanguageCleanup

I've added a few more smaller ideas to LanguageCleanup, and also edited the front page
so the whole list of ideas (including the old CollectedBadIdeas, incl GeneralisedMessages)
are now at the top of the page.

they're currently only on the Grace Wiki, but should move across to mailing lists, blog posts etc.

https://projects.cecs.pdx.edu:8443/~black/NewOOL/index.cgi/wiki/WikiStart

James