Implementing a buggy stack trace viewer.

Implementing a buggy stack trace viewer.

* Source/DebuggerConnection.m:
([DebuggerConnection _stackReceived:]): New method, that is probably leaky, that gets all the attributes for a stack trace and dictionary-izes and array-izes them
* Source/DebuggerWindowController.m|h: Added a _stack ivar and then an appropriate setter
([DebuggerWindowController setStack:]): New method
* English.lproj/Debugger.nib: Adding a binding to _stack to display the stacktrace