Remove warnings

[jorisv]

Remove some warings:

• [x] Don't use -Wno-self-assign-overloaded on GCC (not implemented)
• [x] Remove deprecation warning on EIGENPY_DEFINE_STRUCT_ALLOCATOR_SPECIALIZATION
• [x] Remove useless copy when creating an aligned_vector
• [x] Don't use derived_const_cast hack for quaternion::uniformRandom since it can't take a block as parameter
• [x] Use C++11 syntax to define LieGroupGenericTpl copy constructor and assignment operator
• [x] Add -Wno-maybe-uninitialized with PRAGMA instruction (to false positive on derived_const_cast hack)
• [x] -DNOMINMAX public
  • [x] Remove it from example and tests
• [x] Remove conversion warning in unit tests
• [x] -Wuse-after-free
• [x] Find a way to manage clangCl options
• [x] Move CXX_FLAGS_BY_COMPILER_FRONTEND into jrl-cmakemodules
• [x] Remove -O2 warnings

[jorisv]

Finally, I turn -Wno-maybe-uninitialized to PRIVATE. Use should define in there own projects.

[jorisv]

Still warning in O2