MH moving stuff working with PetSC real. Still cleaning up to do. Haven't seen any side effects... :-O

SNES petsc interface - user function for building the Jacobian (f'(x)) and the Residual (-f(x) = b-Ax)
NL loop governed by PetSC in this case ==> Use with Generate/GenerateJac + SolveNL
Useful SNES options for petsc: 
-snes_monitor
-snes_converged_reason
-snes_type ls/tr
Check on Petsc manual for more!

Some cleaning up in MovingBand2D routines...

* Msg:: -> Message::
* #ifdef some ListUtils/TreeUtils functions
* rename+reduce OS.cpp

Removing the Flag_Summation and #sum in Post_Stream... No need of PostSubOperation->Comma anymore? 

Hope there are no side effects with my SolveNL+PetSC, no problems for compiling Sparskit overhere.

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ERROR->GERROR (as in gmsh) to avoid namespace clash with windows.h + added cpu computation on windows

update headers + bump version

added some comments + fixed gcc warning

Merged Johan's branch + update all headers

- Big header cleanup (remove extra includes)
- Add basic copyright notice in every file
- Add list of contributors in every file

Better stack frame debug