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.

Synchronizing various changes

Made database file case insensitive.
Tinkered dropping rules in INNER_MLILUC.
Added rule for git to ignore svn presence.
Added google analytics pixel to main page.

Added early exit for internal BiCGStab(l). Added test example based on
#6. Resolved #6 for internal solvers.