Added 2-clause bsd license for cmake files requested in cmake script for
petsc.
Introduced cmake option for Mondriaan matrix partitioning package for
solvers.
Changed reading of solver's parameters database to fix uninitialized
access reported by dr.memory.
Fixed bug in svdnxn with static std::vector allocation.
Added features to OldDrawGrid example.
Added solutions to problems described in issue #13.

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.