Update IPOPT related finders

See merge request !167

update OpenMesh

See merge request !166

Make sure wew switch to shader Pipeline when in CoreProfile.

closes #164

Improve plugin.cmake dependency handling.

See merge request !165

plugin.cmake: collect dependency targets to use modern cmake mechanisms to add them with include dirs, library paths etc

- Fix definition of _FOUND macro for lowercase dependencies.
- Support dependencies that are targets, tkae
  INTERFACE_INCLUDE_DIRECTORIES from their properties instead of looking
  for global variables.

Matrix3x3: support multiplication of vectors of different type. [Fixed]

See merge request !164

Revert "Merge branch 'mat3x3-mixed-mult' into 'master'"

See merge request !163

This reverts merge request !162

Matrix3x3: support multiplication of vectors of different type.

See merge request !162

cmake library order

See merge request !161

Gurobi finder: fix cmake warning about mismatching if/endif.

See merge request !160

We need to make sure that optional libraries are loaded in an order
compatible with their depencency graph. This change makes sure CoMISo,
OpenVolumeMesh and HexEx are loaded first, so other libraries can depend
on them.

cmake: disable mac warnings about opengl being deprecated

See merge request !157

Fix a bad cmake typo, RPPATH should be RPATH.

See merge request !158

This didn't make a difference with OLD CMP0042 behaviour, but with NEW
behaviour we really need to set this in some cases for fixup_bundle to
work.

Small documentation fixes

See merge request !155

Doxygen: switch to SHORT_NAMES=NO

See merge request !156

This allows stable deep linking of documentation,
cf https://stackoverflow.com/questions/10615619/how-to-hyperlink-to-deep-doxygen-content