object: 1st-class selectors, selector inheritance, selector namespaces

move SlotDictionary.basicNew into .new and rename the fast version as
something reflecting the inability to add state

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function: namespaces (use _vtbles => a Coke namespace == a Pepsi clone family), symbol search path, relative/absolute path syntax

search path for (load)ed and (require)d files.

auto-load boot.k unless command-line switch disables

line numbers in error messages

generate compiled code in _balloc() memory, not malloc() memory

generate slot accessor syntax in define-type, or add define-struct
