[WIP] Macos fixes#396

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sbusch42 wants to merge 2 commits intomasterfrom

Commits on Aug 20, 2017

Replace all usages of typeid with dynamic_cast, as typeid comparisons between dynamic library boundaries seem to fail on macos
Stefan Buschmann
committed
Find temporary workarounds for weird issues on macos with dynamic casts and typeid (NOT a real solution, but makes it at least render something)
Stefan Buschmann
committed