* NEW: Print a summary of warning messages after each component 
  compilation.

[INTERPRETER]
* BUG: StrPtr() with a length argument now works correctly.
* NEW: Support for callbacks: when converting a function to a Pointer, an 
  internal closure is created with the libffi library. The pointer then can 
  be sent to any extern function as function pointer argument.
* BUG: Opening memory stream should work in all cases now.


git-svn-id: svn://localhost/gambas/trunk@3038 867c0c6c-44f3-4631-809d-bfa615b0a4ec