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Improve Stability Checker

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Open Markus Holzer requested to merge holzer/walberla:FixStabilityChecker into master Apr 01, 2022
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When using FASTMATH in combination with the StabilityChecker it will not work due to

https://stackoverflow.com/questions/22931147/stdisinf-does-not-work-with-ffast-math-how-to-check-for-infinity and https://community.intel.com/t5/Intel-C-Compiler/icx-2021-3-0-bug-isinf-wrong-result/m-p/1316407#M39279

This MR adds more documentation to make people aware of the situation and extends the StabiltyChecker by providing a limiterValue which could be used for checking as an alternative to checking for non-finite values.

Fixes #184

Edited Apr 01, 2022 by Markus Holzer
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Source branch: FixStabilityChecker