add support for working with classes "imported" from another GemStone user's symbolList. A TDDefinition may have a `username` specified and if so the definition will use the symbolList of the given user for resolving class/global names. Trying to propogate the username as far as possible forced me (in a good way) to use class definitions EVERYWHERE instead of direct class refs and it follows that the class definition does the lookup and so on ... touch a fair amount of code across a bunch of element builder classes, so there still might be glitches ... added `inspect builder` to window menu ....
address test failure: TDClientElementTestCase>>testClientElementSerialization ... update MCMetacelloTodeTool implementation and ignore 'Metacello-Cypress' package for ConfigurationOfMetacello ...
Merge branch 'issue_28' of github.com:dalehenrich/tode into issue_28