TODO list

 1 handle 'connection did die' notification for distant objects in STEnvironment
 2 fix class-info lookup for proxies in STEnvironment
 3 implement NSRect object
 5 Smalltalk: separate compiler and compilation context
 9 create a 'Shell' scripting environment
11 Create ApplicationScripting framework, instead of bundle. It should offer
   passive application scripting (without linking) and active app. scripting
   (linking with the framewotk). Give it some reasonable name, becauase that one
   is already used by Apple
13 Change source directory structure (see DevelopmentNotes.txt in Doumentation)
14 Add framework list into environment description
15 Change Modules to Framework
16 Remove StepTalk modules
17 Fill implementation of STScriptObject, STMethod and related STEngine methods
18 Rewrite Smalltalk compiler (grammar)
19 Remove empty directories (Source, Modules/StepTalk)
20 Replace STMethod languageName with map table of method class->engine class
21 Update application scripting to use STConversation