!NC! Fix a typo in sc_progress
!NC! Added a Exception helper class and new functionality to stack handler

* Exception Handling:
   ~ Added a Exception helper class to use wxString with the Sqrat Exceptions
* Stack Handler:
   ~ Added PushInstance
   ~ Added PushValue
   ~ Added PushInstanceCopy
   ~ Added wxString version from throw error
!NC! Fixed missing Header
!NC! fixed some typos
!NC! Use the new StackHandler functions
!NC! initial work on sc_io.cpp

* transferred the binding to sqrat