Improve packaging and export of the project

[jcarpent]

@wxmerkt I have implemented the full export of the project. It should work now. Could you check that the export is working well?

Before merging and making a new release, I will implement a small unit test to check the export is working well too.

[wxmerkt]

Thank you for the great effort. I will check it either tomorrow or Monday (and also check that it doesn't break MoveIt)

[jcarpent]

@wxmerkt I've added a unit test of using the new export. It seems to work well.

[jcarpent]

@wxmerkt A kind reminder. If you have time today to check this PR ;)

[wxmerkt]

I have just tested it and it appears to work.

However, please note: The install path for the eigenpyConfig.cmake is changing from share/cmake/eigenpy to lib/cmake/eigenpy (!!).

[jcarpent]

The install path for the eigenpyConfig.cmake is changing from share/cmake/eigenpy to lib/cmake/eigenpy (!!).

Is it an issue?

[wxmerkt]

It appears to work - we should note it in case someone comes back in future if it breaks something. From me, this PR is good to go

[jcarpent]

Do you want me to install it in the share folder too?

[wxmerkt]

No, let's leave it as is (no duplication) until we have a use case that requires it

[jcarpent]

@wxmerkt Thanks a lot for your nice feedback.