Prevent doxygen from creating large graphs

With the upgrade to doxygen 1.8.8, for some reason dot is having trouble
creating some of the larger graphs, causing dot to seg-fault. This
change disable the include and included by graphs, that are very large.
Also, limit the number of levels the graphs will go, from unlimited to
2. This also has the advantage of making sure the graphs don't get too
large.
Fix doxygen issue with static_assert

It appears that doxygen 1.8.8 has a problem with static_assert. ie, it
can't find declarations for functions defined after static_assert. To
sidestep this issue, this changes the template parameter (BlockSize)
from int to size_t. So there is no longer a need to call static_assert
to make sure BlockSize is greater than zero.
Turn off eigen alignment for 32 bit systems

Eigen alignment is working inconsistently on 32 bit linux in Release
mode, and not at all for Debug 32 bit builds. So we will turn it off by
default for all 32 bit systems (it was already off for 32 bit Windows),
and leave it on for 64 bit builds.
Fix SerializableStapling

Due to the change in config.txt.in, there's no need to include 'Data/'
when loading the scene.
Merge branch 'fix/alignment-32-bit-systems' into 'master'

Disable Eigen Alignment for all 32 bit builds

+1: Ryan Beasley, Julien Lenoir, Harald Scheirich

Merged-on: https://www.assembla.com/code/OpenSurgSim/git/merge_requests/1210463
Revert "Prevent doxygen from creating large graphs"

This reverts commit 419b15a250064f9b32270fd5330cef0401b6bf00. The
segfaults are no longer present on Debian Sid, a package was fixed
(although not sure which).
Merge remote-tracking branch 'origin/master' into fix/serializableStapling
Merge branch 'fix/serializableStapling' into 'master'

Fix SerializableStapling

Merged-on: https://www.assembla.com/code/OpenSurgSim/git/merge_requests/1218303
Merge branch 'fix/doxygen-seg-faults' into 'master'

Fixes for Doxygen 1.8.8

+1: Ryan Beasley, Julien Lenoir, haizhouW

Merged-on: https://www.assembla.com/code/OpenSurgSim/git/merge_requests/1210323