Moved stepper/stepper-language-interface.ss and

mztake/debugger-language-interface.ss to collects/lang to avoid module
depedencies from these to collects/lang.

svn: r7404

collects/lang/htdp-langs.ss

@@ -33,8 +33,8 @@
            ;; and the user's namespace in the teaching languages
            "private/set-result.ss"
            
-           (lib "stepper-language-interface.ss" "stepper")
-           (lib "debugger-language-interface.ss" "mztake"))
+           "stepper-language-interface.ss"
+           "debugger-language-interface.ss")
   
   (provide tool@)
   

collects/mztake/debug-tool.ss

@@ -17,7 +17,7 @@
            "load-sandbox.ss"
            (lib "framework.ss" "framework")
            (lib "string-constant.ss" "string-constants")
-           "debugger-language-interface.ss")
+           (lib "debugger-language-interface.ss" "lang"))
   
   (provide tool@)
   

collects/stepper/stepper-tool.ss

@@ -15,7 +15,7 @@
            (prefix x: "private/mred-extensions.ss")
            "private/shared.ss"
            "private/model-settings.ss"
-           "stepper-language-interface.ss"
+           (lib "stepper-language-interface.ss" "lang")
            "xml-sig.ss")
 
   (provide stepper-tool@