Merge pull request #360 from kronbichler/master

Fix constructor of SchurMatrix for 64 bit indices.
Test bits/step-51: Improve output

This allows numdiff to catch small roundoff errors.
Test umfpack/umfpack_04: Avoid printing exact number of iterations

This commit introduces a new macro for tests to test an iterative solve to
convergence within a given number of iteration steps. Due to roundoff
errors the exact number doesn't have to be stable...
port other tests to new macro
Merge pull request #361 from tamiko/improve_test_stability

Improve test stability
Fixed typo in setup_cpack.
Merge pull request #363 from luca-heltai/fixcpack
fix cmake muparser version string parsing

Turns out there are muparser versions out there that don't have a
subminor version which made our cmake code barf.
Merge pull request #365 from tjhei/muparser_version_parsing

fix cmake muparser version string parsing
Fix undefined symbols on Mac.

Deactivate ShapeInfo::reinit on MSVC target as proposed in c2021e2.