Fixed bug in auto-differentiation that would calculate incorrect weights for derivatives in ad_val(). Adapted several geometrical and adjacency retrieval algorithms to handle broken conformity of the grid during modification, more attention to the problem is needed. Added visual studio debugger helpers. Fixed several issues with openmp support. Added openmp parallelization of BiCGStab(L) solver. Fixed issues that files overwritten with MPI_File* functionality may contain previous information. Fixed a bug in OctreeCutcell, added another example for it. Fixed a bug in collective operations in mesh class.